Lentil Vegetable Soup
Red lentils with carrots, celery, onion, tomatoes and cumin in a simple broth. Lentils dissolve into the soup as they cook, giving it body without any blending. About 14g of fiber per bowl. Gets better the next day.
Ingredients
- 300 gred lentils
- 3 carrots
- 3 celery stalks
- 1 onion
- 4 garlic cloves
- 400 gcanned diced tomatoes
- 1.5 lvegetable broth
- 2 tbspolive oil
- 1.5 tspcumin
- 1 tspsmoked paprika
- 1 tspturmeric
- 1 tspsalt
- 1 lemon
- 2 tbspfresh parsley
Method
- Rinse the red lentils thoroughly until the water runs clear. They don't need soaking — the rinse removes surface starch that makes the soup cloudy and slightly gluey if you skip it.
- Heat olive oil in a large pot over medium heat. Add the diced onion and cook 5 minutes until soft. Add the minced garlic and cook 1 minute. Add the cumin, smoked paprika and turmeric and stir 30 seconds — the spices need heat to release their depth. Adding them to cold liquid tastes raw.
- Add the diced carrots and celery. Stir and cook 3 minutes.
- Add the rinsed lentils, tomatoes and broth. Bring to a boil, then reduce to a steady simmer. Cook uncovered for 25–30 minutes, stirring every few minutes, until the lentils have dissolved into the soup and the vegetables are fully soft.
- Squeeze in the lemon juice and stir. Taste and adjust salt. The lemon is not optional — without acid, lentil soup tastes flat and heavy. Add it after the heat is off so the flavor stays bright.
- Serve with chopped parsley, a drizzle of olive oil and crusty bread. Keeps 5 days in the fridge and freezes well.
FAQ
Flat lentil soup usually skipped two steps. First: the spices weren't bloomed in oil. Cumin and paprika added directly to liquid taste raw and one-dimensional. They need 30 seconds in hot oil before anything else goes in. Second: no acid at the end. A squeeze of lemon or a splash of vinegar after cooking pulls the flavors together. If you want even more depth, cook a tablespoon of tomato paste with the garlic for 2 minutes before adding the broth — it adds a roasted, savory layer.
No soaking needed. Red lentils are split and small — they cook in 20–25 minutes with no prep beyond rinsing. Green or brown lentils need 35–45 minutes and hold their shape rather than dissolving, which gives a chunkier soup. Both work, but the texture is completely different. For this recipe, red lentils are the right choice because the dissolving is what creates the body.
One serving contains roughly 14g of dietary fiber, almost all from the lentils. A cup of cooked red lentils has about 16g of fiber plus prebiotics — specific fibres that feed beneficial gut bacteria. The vegetables add smaller amounts on top. This puts one bowl at well over half the recommended daily intake for fiber in a single meal.
Three options. Cook it longer uncovered — the liquid evaporates and the lentils dissolve further. Blend a third of the soup with an immersion blender and stir it back in. Or mash some lentils against the side of the pot with a spoon. The soup also thickens significantly as it cools, so thin on the stove often means just right at room temperature.
Crusty bread is the obvious choice and makes the bowl genuinely filling. A simple green salad on the side adds freshness. For more protein: stir a spoonful of Greek yogurt into each bowl, or add a cup of cooked chickpeas in the last 10 minutes. The soup has about 14g of protein per serving from the lentils, which is reasonable for a plant-based meal.
Rate this
Recipes by email
One letter a week: a recipe picked for your taste, plus whatever is new on the site. Unsubscribe in one click.
Welcome gift: Sergei's cookbook (e-book).
By subscribing you agree to the privacy policy.
Tell us what you like to cook (30 seconds) →Keep browsing
More dishes from the American archive — picked by overlap with what you're cooking now.
Join the conversation
Comments (1)
Season this lentil vegetable soup in stages, not all at once. I add salt three times: when the red lentils goes in, halfway through cooking, and a final adjustment right before serving. Each addition builds on the last.