Lentils and Noodles: A Hearty One-Pot Noodle Soup Recipe

This lentils and noodles recipe is a hearty one-pot soup made with brown lentils, vegetables, tomatoes, broth, and tender wheat noodles. The lentils simmer until soft while the seasoned broth becomes rich and savory, making this a filling, flexible meal for a weeknight or a chilly day.

Ingredients

2 tablespoons (30 ml) olive oil
1 medium yellow onion, finely diced, about 1 cup (150 g)
2 medium carrots, diced, about 1 cup (150 g)
2 celery ribs, diced, about ½ cup (80 g)
4 garlic cloves, minced, about 12 g
2 tablespoons (32 g) tomato paste
1 teaspoon ground cumin (2 g)
1 teaspoon smoked paprika (2 g)
1 teaspoon dried thyme (1 g)
1½ cups (290 g) dry brown or green lentils, rinsed and picked over
1 can diced tomatoes, about 14½ ounces (411 g), with their juices
8 cups (1.9 L) low-sodium vegetable broth
2 cups (475 ml) water
2 bay leaves
1 teaspoon fine salt (6 g), plus more to taste
½ teaspoon freshly ground black pepper (1 g)
8 ounces (225 g) dried wide wheat noodles
2 tablespoons (30 ml) fresh lemon juice, or to taste
¼ cup (15 g) chopped fresh parsley
¼ teaspoon red pepper flakes (about 0.5 g), optional

Instructions

Prepare the ingredients. Dice the onion, carrots, and celery into small, similar-sized pieces so they soften evenly. Mince the garlic, rinse the lentils in a fine-mesh strainer, and check them for small stones or debris. Measure out the broth, water, seasonings, and noodles before you begin cooking; the lentils need a steady simmer before the noodles go into the pot.
Soften the vegetables. Warm the olive oil in a large heavy pot or Dutch oven over medium heat. Add the onion, carrots, and celery and cook for 7 minutes, stirring occasionally. The vegetables should begin to soften without browning deeply. Stir in the garlic, tomato paste, cumin, smoked paprika, thyme, black pepper, and optional red pepper flakes. Cook for 2 minutes, stirring so the tomato paste darkens slightly and the garlic does not scorch.
Add the lentils and liquid. Tip in the rinsed lentils and diced tomatoes, then pour in the vegetable broth and water. Add the bay leaves and salt. Stir well, scraping the bottom of the pot to release any tomato paste that has stuck there. Bring the mixture to a boil, which should take about 3 minutes, then lower the heat until the soup bubbles gently rather than boiling hard.
Simmer until the lentils are tender. Partially cover the pot and simmer for 28 minutes, stirring once or twice. Keep the heat low enough that the lentils cook evenly and the liquid does not reduce too quickly. At the end of the simmer, taste a few lentils: they should be tender through the middle but still hold their shape. If they remain firm, cook them a little longer before adding the noodles; lentil age and variety can affect the timing.
Cook the noodles in the soup. Stir in the dried noodles and simmer uncovered for about 9 minutes, or follow the package timing if it differs. Stir frequently during the first couple of minutes so the noodles do not stick together or settle on the bottom. Start checking a minute before the package time ends. The noodles should be tender but not mushy, and the soup will thicken as they absorb some of the broth.
Finish and season. Remove the bay leaves. Stir in the lemon juice and parsley, then taste the broth. Add more salt, black pepper, or lemon juice as needed. Lemon brightens the earthy lentils and tomato; add it a teaspoon at a time if you prefer a milder tang. Serve hot while the noodles are still pleasantly firm.

Tips

Choose the right lentils. Brown or green lentils are best here because they usually keep their shape during simmering. Red or yellow lentils break down much more quickly and make a thicker, softer soup; if using them, reduce the simmer time and check frequently. Do not substitute cooked canned lentils at the same point in the method: add drained, rinsed canned lentils only after the vegetables and broth have simmered, and heat them through before cooking the noodles.
Keep the noodles from overcooking. Dried noodles continue to soften in hot broth, even after the burner is off. If you expect leftovers or want especially firm noodles, boil them separately according to the package, drain them, and add a portion to each bowl. The soup itself may need a splash of water or broth when reheated because both lentils and noodles absorb liquid as they sit.
Adjust the salt to your broth. Low-sodium broth gives you better control, but different brands and homemade stocks vary in saltiness. If using regular broth, begin with ½ teaspoon (3 g) salt instead of the full amount, then taste after the noodles cook. If the soup tastes flat rather than salty, a little extra lemon juice can bring the flavors into focus.
Make the texture your own. For a thinner, brothy soup, add hot water or broth a little at a time. For a thicker bowl, mash a small ladleful of lentils against the pot and stir them back in. Avoid a vigorous boil, which can break the lentils and make the noodles gummy before the vegetables and lentils have cooked evenly.

Serving Suggestions

Serve the soup in warm bowls with extra chopped parsley and a lemon wedge so everyone can adjust the brightness. A drizzle of olive oil, a few grinds of black pepper, or a pinch of red pepper flakes makes a simple finish. Crusty bread, toasted pita, or garlic toast is useful for soaking up the broth; a green salad with a sharp vinaigrette provides a fresh contrast to the soft lentils and noodles.

For a more substantial meal, add a small bowl of olives or roasted vegetables at the table. Because the soup already contains lentils, noodles, and vegetables, sides can stay simple. If serving a group, keep extra hot broth nearby: the noodles thicken the pot as it stands, and a ladleful in each bowl restores a looser, soup-like consistency.

Variations

Use different noodles: Small pasta shapes, broken spaghetti, or short durum-wheat noodles work in place of wide noodles. Check the package time and add only enough to leave a little room in the broth; pasta shapes vary in how much liquid they absorb. For a gluten-free version, use a sturdy gluten-free noodle and cook it separately if it tends to soften quickly.

Add greens: Stir in 2 cups (60 g) baby spinach during the final minute, or add 3 cups (90 g) chopped kale about 5 minutes before the noodles are done. Kale needs a little longer to soften. You can also add 1 cup (150 g) diced zucchini with the tomatoes; it will become soft as the lentils simmer.

Change the seasoning: For a warmer, more aromatic soup, add ½ teaspoon (1 g) ground coriander with the cumin. A pinch of cinnamon is another option, though it gives the broth a sweeter, more distinctive note. For a smoky flavor without smoked paprika, use sweet paprika and add a small amount of chipotle powder; it will also make the soup noticeably hotter.

Make it creamy without dairy: Blend about 1 cup (240 ml) of the cooked lentils and broth, then stir the puree back into the pot before adding noodles. This thickens the soup while leaving most of the lentils whole. If you want a richer finish, stir a spoonful of plain yogurt into individual bowls rather than simmering it in the pot.

Storage and Reheating

Cool leftovers promptly and refrigerate them within 2 hours of cooking in shallow, covered containers. The soup keeps for 3–4 days in the refrigerator. It thickens as it chills, so loosen each portion with a few tablespoons of water or broth before reheating. Warm it in a saucepan over medium-low heat, stirring gently until steaming throughout, or microwave a covered bowl in short intervals, stirring between them. Reheat only the amount you plan to eat.

The soup can be frozen for up to 3 months, though noodles may turn soft after thawing. For the best texture, freeze the lentil soup before adding noodles, then cook fresh noodles when you reheat it. If freezing a fully assembled batch, let it cool, portion it into freezer-safe containers with room for expansion, and thaw it overnight in the refrigerator. Reheat gently with extra broth as needed. Do not leave cooked soup at room temperature for extended storage.

Frequently Asked Questions

Can I use canned lentils instead of dried lentils?
Yes. Use about 3½ cups (840 g) drained and rinsed canned lentils in place of the dry lentils. Make the vegetable and tomato broth as directed, but do not simmer the canned lentils for 28 minutes. Add them for the final 8–10 minutes, then cook the noodles. The soup will have a slightly softer texture and may need less salt, so taste before seasoning.

Why are my lentils still firm?
Lentils can take longer to soften if they are old or if the cooking liquid is unusually hard. Continue simmering and check every 5 minutes before adding the noodles, since noodles cooked too early can turn mushy while the lentils catch up. Acidic ingredients such as tomatoes can also slow softening somewhat, so allowing enough simmering time is useful.

Can I cook the noodles separately?
Absolutely. Boil them in a separate pot according to the package directions, drain, and place them in bowls before ladling the lentil soup over them. This is the best approach if you are preparing the soup ahead, serving it over a long meal, or saving leftovers. It also makes it easier to control each serving’s noodle-to-broth ratio.

What kind of noodles work best?
Wide dried wheat noodles give the soup a comforting, substantial bite, but the recipe is flexible. Egg-free pasta, small shells, ditalini, or broken strands all work. Choose a noodle with a cooking time close to 8–10 minutes when adding it directly to the pot, or cook it separately if its package timing is much shorter or longer.

Can I make this soup ahead?
Yes. For the best texture, cook the lentil and vegetable soup a day ahead, refrigerate it, and prepare the noodles separately just before serving. Reheat the soup gently with a little water or broth, then add cooked noodles to each bowl. If you cook the noodles in the soup ahead of time, expect them to absorb more broth and soften during storage.

How can I tell when the lentils are done?
Taste a few lentils from different parts of the pot. They should be tender all the way through, with no hard or chalky center, but still retain their shape. If they are not ready after the stated simmer, keep the soup at a gentle bubble and check again every few minutes. Add the noodles only once the lentils have reached the texture you want.

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