Italian Lentil and Vegetable Soup Recipe
A thick, hearty soup with lentils and vegetables is the Italian answer to our homestyle “everything in one pot” soup. In Tuscany and Umbria, soups like this are eaten especially in winter – they’re simple, inexpensive and warming, and they taste fantastic with a slice of bread.
In Italy, lentil soups are a classic winter “piatto unico” – one hearty dish instead of two courses. They’re often served with a slice of bread that takes the place of pasta.
This Italian lentil soup is reminiscent of homestyle Tuscan minestrone – thick, full of vegetables, with a pronounced herbal aroma and deep, savory umami flavor. It combines simple ingredients with long, gentle cooking, so the lentils become tender without falling apart and the vegetables create a naturally thick, warming broth. It’s a typical “piatto unico” – a single dish that truly fills you up and stands in for a whole meal.
Why this version works
- Sautéing the onion, carrot and celery builds natural sweetness and depth without stock cubes.
- Gentle simmering lets the lentils soften evenly while the vegetables keep their shape.
- Canned tomatoes add acidity that balances the earthy flavor of the lentils.
- No cream or flour – the soup is thickened naturally by the vegetables and pulses.
Chef's tips
Be sure to rinse the lentils in a sieve, and if you’re using older lentils, it’s worth soaking them for an hour so they cook faster and more evenly. Simmer the soup over low heat, without a vigorous boil – otherwise the vegetables may fall apart and the lentils may end up soft on the outside but hard in the center. Season with salt and herbs toward the end, because if you do it too early, the flavor will be less pronounced and the herbs will lose their aroma.
How to serve
Serve the soup with a thick slice of rustic country bread, ideally slightly warmed and drizzled with olive oil – just like in small trattorias in winter. A glass of simple table red wine or just a jug of water with lemon slices pairs beautifully. This dish is perfect for a chilly, busy workday when you want to cook one pot and have a ready meal for two days.
Watch out for
- Avoid boiling the soup hard for a long time – the lentils can split and the vegetables will overcook.
- Don’t salt the soup at the start; in salty liquid lentils cook more slowly and can stay firm in the center.
- Stir right from the bottom, especially towards the end, because thick lentils tend to stick and burn easily.
Substitutions
- You can replace part of the stock with passata if you prefer a more tomato‑forward base.
- Instead of oregano, use Italian herb mix or thyme.
- You can swap brown or green lentils for black beluga lentils, which hold their shape even better.
Ingredients
- lentils rinsed in a sieve - 200 g
- carrot diced small - 2 pieces
- celery stalk diced - 2 stalks
- onion diced - 1 piece
- garlic finely chopped - 2 cloves
- chopped canned tomatoes 1 can - 400 g
- vegetable stock can be from a cube, but mild - 1 l
- bay leaf - 1 piece
- dried oregano - 1 teaspoon
- olive oil for sautéing the vegetables - 3 tablespoons
- fresh parsley chopped, for serving - 2 tablespoons
- salt to taste
- freshly ground black pepper to taste
Preparation
- Rinse the lentils in a sieve under cold running water until the foam disappears. Let them drain – the grains should look clean, with no bits of husk.
- Heat the olive oil in a large pot over medium heat. Add the finely chopped onion, carrot and celery, and stir so the vegetables are evenly coated in fat.
- Sauté the vegetables for 6–8 minutes, stirring often, until they soften noticeably and become glossy‑translucent. If they start to brown or stick, lower the heat and add 1–2 tablespoons of water.
- Add the finely chopped garlic and cook for about 1 minute, until fragrant but still pale. Avoid browning to prevent bitterness.
- Add the rinsed lentils, bay leaf and oregano. Stir so the lentils warm through and get coated in the aromatic oil from the bottom of the pot.
- Pour in the vegetable stock and canned tomatoes with their juices. Stir well, scraping up any browned bits from the bottom, and bring to a gentle boil.
- When the soup starts to bubble lightly, reduce the heat to low. Cover the pot, leaving a small gap, and simmer for 30–35 minutes, stirring from the bottom every few minutes, until the lentils are tender but still hold their shape.
- If the soup is too thick, add a little water or stock; if it’s too thin, cook for a few minutes without the lid until some of the liquid evaporates and the consistency becomes thick and slightly velvety.
- Remove the bay leaf. Season the soup with salt and a generous amount of freshly ground black pepper, stir and taste – the flavor should be herbal, gently tomato‑y, without sharp acidity.
- Serve the soup very hot, sprinkled with chopped parsley. You can drizzle each portion with a teaspoon of good olive oil to add shine and round out the flavor.
Storage
Store leftovers in an airtight container in the fridge for up to 3 days. The soup will thicken as it stands – when reheating, loosen it with a splash of water or stock and heat gently, stirring often. You can also freeze it (without the parsley) for up to 3 months; defrost overnight in the fridge and reheat on low heat.
I most often cook this soup on Sunday evening when I know Monday will be intense – I portion it straight into containers for work lunches. I always keep one small bowl “for tasting” before putting the pot in the fridge.
