Italian Lentil Soup with Pasta: A Cozy One-Pot Recipe

Italian lentil soup with pasta is a hearty, tomato-kissed soup of lentils, vegetables, herbs, and small pasta, served hot with olive oil and grated cheese. This Italian-style version cooks in one pot, and its tender lentils and pasta make a satisfying meal; households and regions have their own variations, so the recipe is a flexible starting point rather than a claim to one definitive version.

Ingredients

2 tablespoons (30 ml) extra-virgin olive oil
1 medium yellow onion, finely diced, about 1 cup (150 g)
2 medium carrots, diced, about 1 cup (130 g)
2 celery ribs, diced, about 1 cup (100 g)
3 garlic cloves, minced, about 9 g
1½ cups (300 g) dried brown or green lentils, picked over and rinsed
1 cup (240 g) crushed tomatoes
7 cups (1.65 L) low-sodium vegetable broth, plus up to 1 cup (240 ml) water or broth for adjusting
1 dried bay leaf
1 teaspoon (1 g) finely chopped fresh rosemary, or ½ teaspoon (0.5 g) dried rosemary
1 teaspoon (5 g) kosher salt, plus more to taste; use less if your broth is salty
¼ teaspoon (0.5 g) freshly ground black pepper
1 cup (100 g) small dried pasta, such as ditalini, small shells, or elbows
1 tablespoon (15 ml) red wine vinegar or fresh lemon juice
¼ cup (25 g) finely grated Parmesan, plus more for serving; omit or use a vegetarian hard cheese if preferred
2 tablespoons (8 g) chopped fresh parsley, for serving
Extra-virgin olive oil, for finishing

Instructions

Prepare the ingredients. Pick through the lentils to remove any small stones or damaged pieces, then rinse them in a fine-mesh strainer under cool water. Dice the onion, carrots, and celery into small, fairly even pieces so they soften at a similar rate. Mince the garlic and measure the remaining ingredients. No soaking is needed for ordinary brown or green lentils.
Build the vegetable base, 8 minutes. Warm the olive oil in a large heavy pot or Dutch oven over medium heat. Add the onion, carrots, celery, salt, and black pepper. Cook for about 6 minutes, stirring every minute or two, until the vegetables begin to soften but are not deeply browned. Stir in the garlic and rosemary and cook for 1 minute, just until fragrant. If the garlic starts to color, move on to the next step rather than letting it scorch.
Simmer the lentils, 30 minutes. Add the rinsed lentils, crushed tomatoes, broth, and bay leaf. Stir and bring the pot to a boil, then lower the heat to maintain a steady, gentle simmer. Partly cover the pot, leaving a small opening for steam, and cook for 30 minutes. Stir once or twice, scraping the bottom of the pot. The lentils should be tender or close to tender; older lentils can take longer, so continue simmering in 5-minute increments if their centers are still firm. Add a splash of broth or water if the soup is becoming thicker than you like.
Cook the pasta, 9 minutes. When the lentils are nearly tender, stir in the pasta. Keep the soup at a gentle simmer and cook for about 9 minutes, or for the time on the pasta package minus a minute if you prefer it particularly firm. Stir frequently near the end because pasta can settle and stick. If the soup is very thick, add some of the reserved broth or water. The finished soup should be substantial but still ladle easily; pasta will continue to absorb liquid as it stands.
Finish and rest, 3 minutes. Remove the bay leaf. Turn off the heat and stir in the vinegar or lemon juice and grated Parmesan. Let the soup stand for 3 minutes, then taste and adjust the salt, pepper, and acidity. Add a little more broth if needed. Ladle into warm bowls, scatter parsley and extra Parmesan over each serving, and finish with a small drizzle of olive oil.

Tips

Choose lentils that hold their shape. Brown and green lentils are reliable here because they soften without immediately turning to puree. Red or yellow lentils cook faster and break down more, so they make a thicker, less textured soup; if using them, shorten the simmer and check often.
Keep the simmer gentle. A hard boil can split lentils and make the vegetables mushy before the centers are tender. If the pot bubbles vigorously, lower the heat. Lentil age and variety affect cooking time, so use tenderness—not just the clock—as your guide.
Adjust the liquid at the end. Pasta and lentils both soak up broth, especially as the soup sits. Keep extra broth or water nearby and stir in a little at a time until the consistency suits you. Taste again after thinning, since added liquid can dilute the seasoning.
Choose your pasta plan based on leftovers. For a soup you expect to finish at one meal, cooking the pasta in the pot is easy and gives it extra flavor. If you are making the soup ahead, cook pasta separately and add it to individual bowls; this helps prevent soft pasta and a very thick pot the next day.

Serving Suggestions

Serve the soup hot as a complete lunch or a simple dinner. A piece of crusty bread is useful for dipping and for catching the tomato-rich broth; toasted bread rubbed with a cut garlic clove is another easy accompaniment. For a lighter table, add a green salad dressed with olive oil and vinegar, or serve sliced fennel, radishes, or other crisp vegetables on the side.

Offer grated Parmesan at the table so each person can add as much as they like, along with black pepper and a little olive oil. If you want a brighter finish, provide lemon wedges for squeezing into individual bowls. The soup is filling, so modest portions work well as a first course before roasted vegetables or a simple main dish.

Variations

Add greens: Stir in 2 packed cups (60 g) of chopped spinach during the final 2 minutes, or add 2 cups (about 70 g) of chopped kale with the pasta so it has time to soften. Spinach wilts quickly; kale stays more substantial. If the greens release water, simmer briefly and taste for seasoning again.

Make it without dairy: Leave out the Parmesan and finish with a little extra olive oil, black pepper, and lemon. A spoonful of nutritional yeast can add a savory note, though it will not taste exactly like aged cheese. Check that any substitute cheese is suitable for your dietary needs.

Use a Parmesan rind: If you have one, add a small Parmesan rind, about 1 ounce (30 g), with the broth and remove it before serving. It gives the broth a deeper savory flavor. The rind is optional; the soup still works without it, and a vegetable broth keeps the base vegetarian when it contains no animal-derived ingredients.

Change the herbs or tomatoes: Use ½ teaspoon (0.5 g) dried oregano in place of rosemary for a different, familiar Italian-style flavor. For a less tomato-forward broth, reduce the crushed tomatoes to ½ cup (120 g) and add ½ cup (120 ml) extra broth. Both choices make a slightly different soup, so season to taste at the end.

Make it spicier: Add ¼ teaspoon (0.5 g) red pepper flakes with the garlic, then offer more at the table. A small amount gives the soup warmth without covering the flavor of the lentils and vegetables.

Storage and Reheating

For food safety, refrigerate the soup within 2 hours of cooking. Transfer it to shallow, covered containers so it cools promptly, and keep it refrigerated for 3–4 days. The pasta will continue to soften and absorb broth while stored, so the leftovers will be thicker than freshly made soup. Add water or broth when reheating to restore a spoonable consistency.

Reheat only the portion you plan to eat in a saucepan over medium-low heat, stirring often until it is steaming throughout and reaches 165°F (74°C); USDA FSIS recommends reheating leftovers to this temperature. Add liquid gradually, then taste and adjust the seasoning. You can also microwave a portion in a covered, microwave-safe bowl, stirring partway through and checking that it is evenly hot.

For longer storage, freeze the soup for about 2–3 months for best quality. Pasta may become softer after thawing, so if you know you will freeze portions, make the lentil soup without pasta and cook fresh pasta when serving. Thaw frozen soup in the refrigerator, then reheat it on the stove and cook pasta separately. Do not leave cooked soup at room temperature for extended storage.

Frequently Asked Questions

Do I need to soak lentils before making this soup?
No. Brown and green lentils cook in the simmering broth without soaking. Rinse them and check for debris first. If you are using an unusual lentil variety, follow its package directions and check the texture as it cooks, since varieties and harvest age can change the timing.

Can I use canned lentils?
Yes. Drain and rinse about 3 cups (510 g) of cooked lentils, then add them after the vegetables have simmered in the broth for about 10 minutes. Once the lentils are in, bring the soup back to a simmer and add the pasta. Since canned lentils are already soft, avoid a long simmer or they may break apart. Use less salt at first, because canned lentils and broth can both be salty.

What pasta works best?
Ditalini is a classic small shape for this kind of soup, but small shells, elbows, or short tube pasta also work. Choose a shape that fits comfortably on a spoon. Cooking time varies by brand and shape, so follow the package timing and start checking a minute early. Long pasta is less convenient to eat in soup unless broken into short pieces before cooking.

Why is my soup thicker the next day?
Lentils and pasta absorb broth as they sit, so thickening is normal rather than a sign that the soup has gone wrong. Stir in water or broth during reheating until it reaches the consistency you want. If the pasta is already very soft, warm the soup gently and avoid prolonged boiling.

Can I make the soup ahead?
Yes. For the best pasta texture, cook the lentils and vegetable base ahead, cool and refrigerate it promptly, and cook pasta separately when you are ready to serve. Reheat the soup base, add cooked pasta to the bowls, and ladle the hot soup over it. If you make the complete recipe ahead, expect softer pasta and plan to thin the soup with broth when reheating.

How can I tell when the lentils are done?
Taste a few lentils from different parts of the pot. They should be tender through the center but still hold their shape, with no hard or chalky bite. If they are firm, simmer them a little longer and add liquid as needed. Check before adding pasta so the pasta does not overcook while waiting for the lentils.

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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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