Easy Greek Red Lentil Soup Recipe with Lemon and Herbs

This Greek-inspired red lentil soup brings together red lentils, tomato, olive oil, oregano and lemon in a warming, spoonable bowl. Red lentils cook quickly and soften into a naturally thick soup, while the citrus and herbs keep the flavour bright; Greek home-style lentil soups vary, and this is one easy version rather than a claim to a single definitive recipe.

Ingredients

2 tablespoons (30 ml) extra-virgin olive oil, plus a little more for serving if you like
1 medium yellow or brown onion, finely diced, about 1 cup (150 g)
1 medium carrot, finely diced, about ¾ cup (100 g)
1 celery stalk, finely diced, about ½ cup (60 g)
3 garlic cloves, finely chopped, about 1 tablespoon (9 g)
1 tablespoon (15 g) tomato purée (tomato paste)
1½ cups (300 g) dried red split lentils
¾ cup (200 g) chopped tomatoes, from a small tin or carton
5 cups (1.2 litres) vegetable stock or water
1 dried bay leaf
1 teaspoon (1 g) dried oregano
½ teaspoon (1 g) ground cumin, optional
1 teaspoon (6 g) fine salt, or less if your stock is salty
¼ teaspoon (0.5 g) freshly ground black pepper
2 tablespoons (30 ml) fresh lemon juice, from about 1 lemon
2 tablespoons (8 g) chopped fresh flat-leaf parsley, for serving
⅓ cup (50 g) crumbled feta, optional, for serving

Instructions

Prepare the ingredients. Dice the onion, carrot and celery, chop the garlic, and measure the lentils and seasonings. Put the lentils in a sieve and rinse under cool running water, moving them around with your fingers until the water runs mostly clear. Pick out any small stones or damaged lentils. Red split lentils do not need soaking; rinsing is enough. This preparation takes about 12 minutes.
Soften the vegetables. Set a large, heavy-based saucepan over a medium heat and add the olive oil. When it is warm, add the onion, carrot and celery. Cook for 6 minutes, stirring every so often, until the onion is soft and the vegetables have begun to lose their raw, firm look. They should not need to brown. Stir in the garlic and cook for 1 minute, then add the tomato purée, oregano and cumin, if using. Stir for 1 minute so the tomato purée darkens slightly and coats the vegetables.
Add the lentils and simmer. Tip in the rinsed lentils, chopped tomatoes, stock or water, bay leaf, salt and black pepper. Stir well and bring the pot to a gentle boil. Lower the heat so the soup simmers steadily, then cook uncovered for 22 minutes. Stir a few times, scraping the base of the pan so lentils do not catch. The lentils should be soft and breaking apart, and the soup should look thick and creamy. If the lentils still have a firm centre, simmer for another 2–3 minutes and check again.
Finish and season. Take out the bay leaf. Stir in the lemon juice and taste the soup. Add more salt, pepper or lemon a little at a time; the right balance should taste savoury and gently tangy, not sharply sour. If it is thicker than you prefer, stir in hot water a splash at a time until it reaches your preferred consistency. Let it bubble gently for 5 minutes, stirring once or twice, then turn off the heat.
Serve. Ladle into warm bowls and finish with chopped parsley, a drizzle of olive oil and, if desired, crumbled feta. Serve with bread for dipping. The soup will continue to thicken as it stands, so keep a little hot water nearby if you want to loosen individual portions.

Tips

Rinse, but do not soak. Rinsing removes loose starch and any grit; soaking is unnecessary for split red lentils and can make their cooking time harder to judge. Check the packet if you are using a different lentil variety, as whole or brown lentils take longer and may need extra liquid.
Keep the simmer gentle. A hard boil can make the bottom catch before the lentils are tender. Stir periodically, especially during the last few minutes, and use a heavy-based pan if you have one. If the soup starts to stick, lower the heat and add a small splash of water.
Adjust the texture at the end. Red lentils naturally break down, so this soup does not need blending. For a smoother finish, use a stick blender briefly; for a looser soup, add hot stock or water gradually. Avoid adding a large amount at once, which can leave the flavour diluted.
Make the seasoning work for your stock. Stock cubes and ready-made stocks vary in saltiness. Start with less salt if yours is salty, then taste once the lentils are cooked and add more if needed. Lemon is also easiest to judge at the end, when you can balance it against the finished soup.

Serving Suggestions

Serve the soup as a light main course with crusty bread, toasted sourdough or warm flatbread. A Greek-style salad of cucumber, tomato, red onion and olives makes a fresh contrast, especially if you want to turn the soup into a more substantial lunch. For a simple supper, put bowls of parsley, lemon wedges, feta and extra olive oil on the table so everyone can finish their own portion.

Feta adds a salty, creamy note, while a spoonful of plain yoghurt gives a cooler finish. If you are serving the soup with feta or salty bread, taste before adding extra salt at the table. A little chilli oil or a pinch of chilli flakes works for anyone who likes heat, but it is not needed for the recipe to taste complete.

Variations

Make it vegan. The soup itself is vegan when made with vegetable stock or water. Leave off the feta, or replace it with a spoonful of unsweetened plant-based yoghurt. Check the label on any stock or topping if you are cooking for someone who avoids particular ingredients.

Use water instead of stock. Water keeps the lentil and tomato flavours clear and is a useful choice if your stock is strongly flavoured or salty. Taste at the end and adjust the salt, lemon and pepper. If using a stock cube, follow its dilution directions rather than adding it undiluted.

Add leafy greens. Stir in 2 packed cups (about 60 g) of baby spinach during the final 2 minutes, or add 1 cup (about 30 g) of finely chopped kale for the final 5–7 minutes. Spinach wilts quickly; kale needs a little longer to soften. Add a splash of water if the greens make the soup too thick.

Change the herbs and spice. The cumin is optional: leave it out for a more straightforward tomato, oregano and lemon flavour. A small pinch of smoked paprika gives a gentle smoky note, while fresh dill can replace the parsley at serving time. These are simple flavour variations, not required ingredients for this Greek-inspired version.

Use a different lentil carefully. Yellow split lentils can be used in a similar quantity and generally give a comparable soft texture, though cooking time can vary by brand. Brown or green lentils hold their shape more and usually need a longer simmer and more liquid, so they will not produce the same quick, thick soup. Follow their packet timing and add stock as needed.

Storage and Reheating

Cool the soup promptly and refrigerate it within 2 hours of cooking in a covered container. It keeps for 3–4 days in the fridge. The lentils absorb liquid as they sit, so the soup will be thicker the next day; loosen it in a saucepan with a splash of water or stock while reheating. Stir frequently and heat until steaming throughout. For food safety, reheat leftovers to 165°F (74°C), checking the centre with a food thermometer.

To freeze, cool the soup, portion it into freezer-safe containers and freeze for up to 3 months for best quality. Leave a little space at the top because liquid expands as it freezes. Thaw overnight in the refrigerator, then reheat on the hob, stirring and adding liquid if needed. You can also reheat it from frozen in a covered saucepan over low heat, breaking up the frozen portion as it softens and stirring often so it heats evenly.

Frequently Asked Questions

Do red lentils need to be soaked before making soup?

No. Dried red split lentils cook quickly without soaking. Rinse them in a sieve to remove loose starch and check for any grit, then add them directly to the pot. Soaking can make them soften sooner, but it is not needed for this recipe and would change the stated cooking time.

Can I blend this Greek red lentil soup?

Yes. The lentils mostly break down as they simmer, so blending is optional rather than necessary. For a smooth soup, use a stick blender in the pan after removing the bay leaf. Blend carefully while the soup is hot, keeping the blender head submerged to reduce splashes. For a more textured bowl, blend only a portion and stir it back in.

Why is my red lentil soup too thick?

Red lentils absorb liquid as they cook and continue to thicken after cooking, so a dense texture is common. Stir in hot water or stock a little at a time until it is loose enough for your liking, then taste again and adjust the seasoning. If it is too thin, simmer it uncovered for a few minutes, stirring so the lentils do not catch on the pan.

Can I make the soup ahead?

Yes. Make it up to 3–4 days ahead and refrigerate it within 2 hours of cooking. The flavour remains good, but the texture will be thicker after chilling, so add a little water or stock as you reheat it. Keep fresh parsley, feta and any other toppings separate until serving for a fresher finish.

Is this the same as traditional Greek lentil soup?

It is a Greek-inspired version using familiar ingredients such as olive oil, tomato, oregano and lemon. Greek lentil soup has regional and household variations, and many versions use brown or green lentils that stay more intact. Red lentils cook faster and break down, which gives this recipe its thicker, smoother texture.

Can I use canned lentils instead of dried red lentils?

Canned lentils are already cooked and usually hold their shape, so they will not create the same thick texture. For a practical adaptation, reduce the stock to about 3 cups (720 ml), simmer the vegetables and tomato with the seasonings for around 15 minutes, then add 2 drained cans (about 480 g drained lentils) and warm through for 5–7 minutes. Mash some lentils against the side of the pan if you want a thicker result, and season to taste.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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