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All 12 Vegetables That Start With O (2024 smartphone edition)

This list of vegetables that start with O has some surprising hidden gems.

Visualize yourself wandering through a colorful farmers market. As you weave through the crowd, you spot something – a vegetable that starts with the mysterious letter “O”. Intrigued?

I mean, you have probably thought of onions and olives. But did you know there are more vegetables with O?

I bet you didn’t think of the variety of unusual greens and roots you could eat. Join me as we uncover these vegetable names, unravel their mysteries, and learn why they belong in your culinary adventures.

Vegetables That Start With O featured image | Girl Meets Food

Here are 12 names of vegetables you’ll want to find in your grocery store for some unique taste combinations. All of them are considered culinary veggies which means you can cook and eat them as vegetables, even if they’re fruits botanically.

Oakleaf lettuce

Oakleaf lettuce is appreciated for its unusual look and taste. Its lobed leaves resemble oak leaves, thus its name.

The soft, buttery leaves are pale green to dark crimson with mild sweetness. This lettuce’s leaf shape and color make it appealing in salads and sandwiches. Its delicate leaves taste best fresh.

Oakleaf lettuce is low-calorie and high in vitamins A and K. It’s also a great source of fiber and modest levels of calcium and potassium.

This vegetable starting with O is suited for both spring and fall planting. The plant’s scientific name is Lactuca sativa, and it is related to the common lettuce.


Oca vegetables in a bowl and on a table | Girl Meets Food

The Andean root vegetable oca (Oxalis tuberosa) is also often known as the New Zealand yam. Its elongated tubers are grown for culinary purposes.

Oca tubers are red, yellow, orange, and pink. Like radish or sour apples, they have an acidic, lemony taste and crisp texture when raw.

Oca is used in salads, stir-fries, and side dishes after being boiled, roasted, or fried. Vitamin C, potassium, and antioxidants all contribute to its high nutrient richness.


A bowl of prepared ogonori | Girl Meets Food

Ogonori – also known as sea moss or Irish moss – is an edible seaweed used in Asian and Caribbean cuisines. These red algae from rocky coastal locations are gathered for their nutritional and culinary value.

Flat, leafy fronds of reddish-brown or purple ogonori are usually dried and cut into strips prior to cooking. Rehydrated fronds are sticky or viscous and can grow to many inches. The flavor is mild and somewhat salty.

Ogonori thickens soups, stews, desserts, and drinks. Its smooth, somewhat thick texture when cooked is what makes it so popular. Ogonori can also stabilize or emulsify food.

Ogonori is very nutritionally valuable. It contains vitamin K, B vitamins, iodine, calcium, iron, and antioxidants.

Ogonori belongs to the genus Gracilaria and makes a-a healthy, low-calorie supplement to meals.

Oil palm

Palm oil tree | Girl Meets Food

Oil palm fruit refers to the fruit produced by the oil palm tree, scientifically known as Elaeis guineensis. The oil palm is a tropical tree that is primarily cultivated for its fruit, which is rich in oil.

This fruit starts with O, and I added it to this list of veggies with O because it produces what’s called edible VEGETABLE oil.

Oil palm fruit is oval-shaped and about the size of a plum. It consists of a fleshy outer layer, known as the mesocarp, and a hard inner shell that encloses the seed or kernel. The mesocarp is the part of the fruit that is used to extract palm oil.

Palm oil is a versatile and widely used vegetable oil that is utilized in various industries, including food, cosmetics, and biofuel production. It’s known for its high content of saturated and unsaturated fats.

The oil is extracted by processing the mesocarp of the oil palm fruit through methods such as pressing or solvent extraction.

Oil palm trees are primarily grown in regions with tropical climates, such as Southeast Asia, Africa, and parts of South America. Unfortunately, the cultivation of oil palm fruit has faced concerns regarding deforestation, habitat destruction, and sustainability practices.

It’s important to clarify that oil palm fruit is mostly used to make palm oil, not eaten raw. However, palm oil is extensively used as a cooking oil and food additive.

Okinawa spinach

Southeast Asian spinach, known as Gynura crepioides or Gynura bicolor, is endemic to Okinawa, Japan. It is called “Okinawan spinach” because of its origin.

Okinawa spinach is an Asteraceae perennial like daisies and sunflowers. It has thick, dark green leaves with purple undersides, giving it an attractive appearance. The leaves are slightly succulent and have a little tangy or mustard-like taste.

Due to its toughness, Okinawa spinach is usually cooked. Stir-fries, soups, stews, and other meals employ its mild and slightly earthy taste.

Okinawa spinach is used in cooking and can provide health advantages. It contains antioxidants, vitamins, and minerals and may have anti-inflammatory qualities.

Okinawa spinach is rare but can be found at specialist Asian markets or grown in exotic vegetable gardens.

Okinawan sweet potatoes

Okinawan sweet potatoes, sometimes known as Hawaiian or purple sweet potatoes, are Japanese sweet potatoes from Okinawa. They’re prized for their purple flesh and somewhat sweet flavor.

Okinawan sweet potatoes are purple inside and out. Depending on variety and maturity, the flesh might be pale purple or darker. Like other sweet potatoes, they are thick and starchy.

Okinawan sweet potatoes taste milder than orange-fleshed sweet potatoes. Their earthy, nutty flavor makes them useful in sweet and savory recipes.

Many dishes employ these sweet potatoes. They are baked, roasted, boiled, or steamed and used in pies, cakes, puddings, and side dishes. They can also spice up many recipes.

Okinawan sweet potatoes include fiber, vitamins A and C, and antioxidants. What makes the plant purple is actually anthocyanins, antioxidant plant chemicals.

Okinawan sweet potatoes are now loved worldwide for their unusual flavor, pleasing look, and potential health advantages.

The Okinawan sweet potato plant is botanically known as Ipomoea batatas.


Fresh okra on a table and okra slices in a rectangle bowl | Girl Meets Food

Okra – Abelmoschus esculentus – is a tropical and subtropical vegetable. Its long, thin form has also given it the name “ladies’ fingers.”

Okra belongs to the mallow family and is cultivated for its edible green pods. These pods are picked while young and tender.

Okra is a popular vegetable that is often cooked in soups and stews, or fried as a side dish. However, its slimy texture and mild flavor can be an acquired taste.

Okra is rich in fiber, vitamins C, K, and folate. It’s also potassium- and magnesium-rich and low-calorie.


Olives, a tiny fruit, are commonly used in cooking. Due to their popularity and preparation, olives are often considered a culinary vegetable.

Olea europaea olive trees, native to the Mediterranean, have been farmed for thousands of years. Olives can taste light and buttery or acidic and saline, depending on the type and curing technique.

Although bitter, some olives are eaten straight off the tree. To reduce bitterness and increase flavor, most olives are cured.

Salads, pizzas, spaghetti, and dishes from the Mediterranean and the Middle East all benefit from the addition of cured olives.

Olive oil, a staple in many kitchens and salad bars, is extracted from these fruits. If you’re curious, olive oil makes a great alternative to avocado oil and other cooking oils.

They, in general, are delicious and healthful. Olives have beneficial nutrients including vitamin E, antioxidants, and fatty acids. Possible health advantages may also vary with respect to variety and mode of preparation.

It’s important to note that green olives and black olives have different tastes and textures. So choose the right one for your dish!

While we’re still talking about olives, why not discover the best olive substitute for your dishes? It’s always good to have a plan B!

You should also check out our awesome charcuterie ideas, to see how you can incorporate yummy olives and other things into a tasty charcuterie board.


Onion is a very popular and versatile vegetable. Its robust smell and taste provide depth and savory flavors to many meals. For thousands of years, onions have been grown and used in numerous cuisines.

The edible component of an onion is a bulb of densely packed, fleshy layers under a papery covering. Different varieties determine the bulb’s size, shape, and color.

White, yellow, and red onions are the most commonly used vegetable varieties.

Onions can be eaten raw or cooked, and their flavors range from mild and sweet to bitter and acidic. They’re a foundation element in soups, stews, sauces, and stir-fries. Onions can be caramelized, pickled, or used as a flavor enhancer.

Onions also provide health benefits. They include antioxidants, vitamins C and B6, and fiber. Onions’ sulfur compounds may help reduce cholesterol and lower the risk of heart disease.

The scientific name of the common onion or bulb onion is Allium cepa. It belongs to the family Amaryllidaceae.


Orach purple leaves | Girl Meets Food

Orach – Atriplex hortensis – is a leafy vegetable used in cooking. It’s also called garden orache, red orache, mountain spinach, French spinach etc. Spinach and beets are relatives of orach.

Large orache leaves are triangular or diamond-shaped. The leaves might be green, crimson, purple, or a combination of these colors.

So orach is aesthetically beautiful and appetizing!

Orach’s mild, salty flavor resembles spinach. It’s good in raw salads or cooked like other leafy greens. Sautés, stir-fries, soups, and stews use orach leaves because they soften when cooked. Younger leaves are delicate and typically eaten uncooked.

Vitamins A, C, and K, along with other antioxidants and minerals, can all be found in orach.

It’s simple to cultivate in backyard gardens and on family farms, and it tastes fantastic as a spinach alternative green.

Oyster mushroom

Oyster mushroom (Pleurotus ostreatus) is a globally eaten edible fungus. It’s called an oyster because of its form and color.

Oyster mushrooms have a short, central stem and a smooth, convex top. The cap’s color depends on the variety: white, cream, beige, pink, yellow, or gray. The cap’s underside has closely spaced gills that go along the stem.

These mushrooms grow commercially and in the wild on dead or rotting wood like tree trunks or logs. Oyster mushrooms have a mild, delicate taste and a supple, somewhat chewy texture when cooked.

Oyster mushrooms can be cooked in several ways. They’re great in soups, stews, risottos, and pasta. They’re widely used in vegetarian and vegan dishes as a meat replacement because of their meaty feel.

Oyster mushrooms’ low fat and calorie content really appeals to me. Fiber, protein, B vitamins including niacin and pantothenic acid, minerals like potassium and phosphorus, and antioxidants are also present.

Oyster plant

Salsify root | Girl Meets Food

Salsify is dubbed “oyster plant” because of its oyster-like flavor when cooked.

Salsify is a root vegetable in the daisy family. Its brown root has a gentle, delicate taste. Salsify is known as the “oyster plant” because it tastes like artichokes or oysters when cooked.

The oyster plant has several uses. Boiling, roasting, sautéing, or using in soups and stews are all great options. Cooking it exposes the white meat inside the root.

Salsify tastes good with herbs, butter, lemon, and cream sauces. Although it isn’t as well-known as other vegetables, it can add a delicious taste to many dishes.

It also goes beyond the kitchen. Salsify has been used for medicinal purposes for centuries to treat a variety of ailments thanks to its vitamins A, C, and K, along with minerals like potassium and magnesium.

This species of plant is scientifically known as Tragopogon porrifolius.

Vegetables That Start With O recipe | Girl Meets Food

All 12 Vegetables That Start With O (2024 smartphone edition)

Discover a diverse array of delicious and nutritious vegetables that start with O. Explore their flavors and health benefits!


  • Oakleaf lettuce
  • Oca
  • Ogonori
  • Oil palm
  • Okinawa spinach
  • Okinawan sweet potatoes
  • Okra
  • Olive
  • Onion
  • Orach
  • Oyster mushroom
  • Oyster plant

As we say goodbye to the intriguing world of veggies that start with O, let us remember nature’s amazing bounty. These veggies can really spice up our palates, from the simpler okra to the more exotic oyster plant.

Our culinary journey continues! Check out our other tasty food articles if you’re hungry for more.

In my guide to O-foods, you’ll find some great ideas on new foods for your next meal. Also, don’t miss my list of fruits that start with O for a rush of natural sweetness provided by oriental persimmons, Osteen mangoes, and more.

There are endless flavors and sensations to discover in veggies, meals, and fruits. Welcome the wonderful delights for taste buds!

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