Italian Noodle Soup with Sausage, Tomatoes, and Greens

Italian noodle soup is a hearty, Italian-American-style bowl of pasta simmered with sausage, tomatoes, vegetables, and leafy greens in a savory broth. This version uses small ditalini so every spoonful gets a little pasta, while browned sausage and a squeeze of lemon bring depth and balance. Families and regions make many kinds of Italian soups, so think of this as a flexible home-style recipe rather than one definitive traditional version.

Ingredients

1 tablespoon (15 ml) olive oil, plus more only if needed
1 pound (454 g) mild or hot Italian sausage, casings removed if using links
1 medium yellow onion, diced, about 1 cup (150 g)
2 medium carrots, diced, about 1 cup (130 g)
2 celery ribs, diced, about 1 cup (120 g)
4 garlic cloves, finely chopped, about 12 g
2 tablespoons (30 g) tomato paste
2 teaspoons (2 g) Italian seasoning
¼ teaspoon (0.5 g) red pepper flakes, optional
1 can crushed tomatoes, 14.5 ounces (411 g)
8 cups (1.9 L) low-sodium chicken broth or vegetable broth
1 dried bay leaf
1½ cups (180 g) dry ditalini or another small pasta
3 packed cups (90 g) chopped kale or baby spinach, tough stems removed
1 teaspoon (5 g) kosher salt, plus more to taste
½ teaspoon (1 g) freshly ground black pepper
1 tablespoon (15 ml) fresh lemon juice
½ cup (45 g) finely grated Parmesan, plus more for serving
1 Parmesan rind, about 25 g, optional

Instructions

Prepare the ingredients. Dice the onion, carrots, and celery into small, similar-sized pieces so they soften evenly. Chop the garlic and kale, measure the pasta and seasonings, and remove sausage casings if necessary. This preparation takes about 18 minutes; having everything ready makes the cooking steps easier to manage.
Brown the sausage, 8 minutes. Warm the olive oil in a large, heavy soup pot over medium-high heat. Add the sausage and break it into small crumbles with a sturdy spoon. Cook, stirring and turning the pieces, until browned with no raw-looking centers. Check the largest pieces with a food thermometer: ground meat must reach the USDA FSIS safe minimum of 160°F (71°C). If the sausage releases plenty of fat, you can use less or no additional oil next time.
Soften the vegetables, 5 minutes. Stir in the onion, carrots, celery, salt, and black pepper. Cook, scraping the bottom of the pot, until the onion starts to turn translucent and the vegetables begin to soften. Add the garlic, tomato paste, Italian seasoning, and red pepper flakes if using. Stir for about 30 seconds, just until fragrant and the tomato paste darkens slightly; avoid letting the garlic scorch.
Simmer the broth, 18 minutes. Pour in the crushed tomatoes and broth, then add the bay leaf and Parmesan rind if using. Stir well and bring the liquid to a boil. Lower the heat to maintain a steady, gentle simmer, partially cover the pot, and cook for 18 minutes. The carrots should be tender when pierced but still hold their shape. Remove and discard the bay leaf and Parmesan rind.
Cook the pasta and greens, 9 minutes. Stir in the ditalini and keep the soup at a gentle simmer, stirring occasionally so the pasta does not stick to the bottom. Cook for 9 minutes, or until the pasta is just al dente; if the package gives a different cooking time, use that as your guide. Stir in the kale for the final 2 minutes of pasta cooking, or add baby spinach for the final minute so it wilts without becoming dull and overcooked.
Finish and serve, 1 minute. Turn off the heat, remove the pot from the burner, and stir in the lemon juice and grated Parmesan. Taste the broth before adding more salt, since sausage, broth, and cheese can all be salty. If the soup seems thicker than you like, stir in a little hot broth or water. Serve while the pasta is tender and the soup is hot.

Tips

Choose the sausage you enjoy. Mild Italian sausage gives a rounded, savory flavor; hot sausage and red pepper flakes make the soup noticeably spicier. If using links, remove the casings before browning. Pork or chicken Italian sausage both work, but follow the ground-meat safety temperature for either kind.
Watch the pasta closely. Small shapes can go from pleasantly firm to soft quickly, and pasta continues to absorb broth while sitting in the pot. Start checking at the package’s lower time range and stop when it is just al dente. Keep a little extra hot broth nearby to loosen the soup if needed.
Adjust the salt at the end. Low-sodium broth gives you more control, but brands and sausages vary. Parmesan also adds saltiness, so taste after it has melted into the soup. If the flavor tastes heavy rather than lively, a little more lemon juice can brighten it without adding more salt.
Use a practical Parmesan-rind substitute. A rind gives the simmering broth a gentle savory richness, but it is optional and may be hard to find. Leave it out and add a little extra grated Parmesan at the table; the finished soup will still taste good, though the broth will have slightly less depth.

Serving Suggestions

Serve the soup in warmed bowls with extra Parmesan and black pepper. A crisp green salad with a simple vinaigrette makes a fresh counterpoint to the rich sausage broth, while toasted bread or garlic bread is useful for soaking up the tomato and cheese flavors. For a lighter side, offer sliced cucumbers or a platter of raw vegetables. If serving a group, put lemon wedges, grated cheese, and red pepper flakes on the table so each person can adjust the brightness, saltiness, and heat.

This recipe is filling enough to be a main course, especially with bread, but it also works as a first course in smaller portions. For a casual meal, serve it directly from the pot and keep extra broth warm on the stove. The pasta thickens the soup as it stands, so a splash of hot broth just before serving restores a more spoonable consistency without diluting it much.

Variations

Make it meatless: Omit the sausage and begin by softening the vegetables in 2 tablespoons (30 ml) olive oil. Add one drained can of cannellini beans, about 15 ounces (425 g), with the broth. The beans add substance and a creamy texture, while the soup has a gentler, less meaty flavor. Use vegetable broth and check that the Parmesan is suitable if you need a fully vegetarian version.

Change the pasta or greens: Small shells, elbows, or broken spaghetti can stand in for ditalini. Keep the amount close to 1½ cups (180 g), but follow the package time because shapes cook at different speeds. Escarole, chopped Swiss chard, or spinach can replace kale. Tender spinach needs less time; sturdier greens benefit from a couple of minutes in the simmering broth.

Add beans or vegetables: Stir in a drained can of cannellini beans or great northern beans with the tomatoes and broth for a heartier pot. Zucchini or diced bell pepper can go in with the carrots and celery, though they soften faster. Avoid adding too many extras at once, since crowding the pot can make the broth seem less balanced and leave too little room for the pasta to cook evenly.

Storage and Reheating

Refrigerate leftovers within 2 hours of cooking in shallow, airtight containers. The soup keeps for 3 to 4 days in the refrigerator. The pasta will continue soaking up broth as it cools, so expect leftovers to be thicker than the freshly served soup. When convenient, store cooked pasta separately from the broth and combine portions as you serve them; this gives the best noodle texture. If the pasta is already mixed in, add a splash of broth or water when reheating.

Reheat soup in a saucepan over medium heat, stirring occasionally until it is steaming throughout and reaches 165°F (74°C), the USDA FSIS safe temperature for reheated leftovers. In a microwave, cover a portion loosely, heat in short intervals, and stir between intervals so the center warms evenly; check the temperature with a food thermometer. Freeze soup for about 2 to 3 months for best quality. For better texture, freeze the broth and sausage mixture without pasta, then cook fresh pasta when you thaw and reheat it. Thaw in the refrigerator rather than leaving soup at room temperature.

Frequently Asked Questions

What kind of noodles work best in Italian noodle soup?

Ditalini is a good choice because its small tubes fit easily on a spoon and cook quickly. Small shells, elbow macaroni, or another small pasta shape also work. If using long pasta such as spaghetti, break it into short lengths before adding it. Check the package timing because thicker shapes may need longer, and keep the pot at a gentle simmer to prevent the noodles from breaking apart.

Can I make this soup ahead of time?

Yes. For the best texture, cook the sausage, vegetables, and broth ahead, cool and refrigerate that base, then bring it to a simmer and cook the pasta shortly before serving. If you make the complete soup in advance, the noodles will absorb liquid while stored. Reheat with extra broth, and remember to bring leftovers to 165°F (74°C). The broth-based portion can be prepared a day or two ahead and kept refrigerated.

Can I use cooked sausage instead of raw sausage?

Yes, but the browning step will be different. Slice or crumble fully cooked sausage and brown it briefly for flavor, then continue with the vegetables. Because it is already cooked, it does not need the raw ground-sausage cooking step, though the finished soup should still be brought to a good simmer. For leftovers, reheat the soup to 165°F (74°C).

Why did my soup become too thick?

The pasta absorbs broth as it cooks and continues to take up liquid after the heat is off. This is normal, especially if the soup sits before serving or is refrigerated overnight. Stir in hot broth or water a little at a time until it reaches the consistency you want. Taste again afterward, since extra liquid can soften the seasoning, and adjust with salt, pepper, or lemon if needed.

Can I make Italian noodle soup without tomatoes?

You can leave out the crushed tomatoes and tomato paste for a lighter, clearer broth, although the soup will no longer have the same tomato-forward character. Replace the crushed tomatoes with an equal amount of broth, and consider adding beans or extra vegetables for body. Taste before serving and use lemon and Parmesan to give the milder broth a little more definition.

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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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