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This tasty Sausage and Lentil Soup also has roasted red pepper, and I love how spicy Italian Sausage adds flavor to this easy-to-make soup! And this recipe uses a lot of sausage and not many lentils, so it’s surprisingly low in net carbs!

PIN the lentil soup with sausage to try it later!

Sausage and Lentil Soup shown in two serving bowls on red napkin

This Sausage and Lentil Soup is something I’d love to pull out of the freezer for an easy dinner, and it’s definitely starting to feel like soup season in most of the northern hemisphere! And even though lentils have some carbs, this lentil soup with sausage is definitely a carb-conscious soup with lots of sausage and peppers and not that many lentils. 

When I updated the recipe a few years ago I ended up using a whole package (19.5 oz.) of Italian sausage so there’s more sausage compared to the amount of lentils. And lentils are high in fiber too, so with only one cup of dried lentils in six servings this soup would be a good choice for low-carb eaters.

And more sausage and lots of roasted red pepper with lentils sounds good to me.  I love sausage, lentils, peppers, and all the other flavors in this soup, hope you enjoy!

What ingredients do you need for this recipe?

(This is only a list of ingredients; please scroll down for complete printable recipe. Or if you use the JUMP TO RECIPE link at the top of the page, it will take you directly to the complete recipe with ingredient amounts.)

How low in carbs is this lentil soup with sausage?

This easy soup recipe has only about 10 net carbs per serving!

What red pepper can you use for Sausage and Lentil Soup?

I used roasted red pepper from a jar for this soup recipe, which made this soup quick and easy to get on the table! You can also use diced fresh red bell peppers, and add them a bit earlier in the cooking time.

Can you use red lentils for this soup?

I love red lentils (affiliate link) in soup and if you wanted to use them in this sausage lentil soup recipe they would cook a bit more quickly than the brown ones.

Can you freeze the Sausage and Lentil Soup?

I love stockpiling soup in the freezer during the winter months, and this soup is great to freeze in individual containers and pull out some for a quick meal.

Sausage and Lentil Soup process shots collage

How to make Sausage and Lentil Soup:

(This is only a summary of the steps for the recipe; please scroll down for complete printable recipe. Or if you use the JUMP TO RECIPE link at the top of the page, it will take you directly to the complete recipe.)

  1. Brown the sausage well and put it in the soup pot. (I used to use turkey Italian sausage for this soup, but now I can’t find that very often and pork sausage will also be delicious. Use either sweet or hot Italian sausage, whichever you prefer.)
  2. Brown the onions and add to the soup pot with the chicken stock or broth, lentils, ground fennel, dried thyme, and dried sage.
  3. Drain the roasted red peppers into a colander.
  4. Let the soup simmer until the lentils are tender, about 45 minutes.
  5. When the lentils are tender, chop the red peppers and add to the soup.
  6. Then let soup simmer about 45 minutes more, or until lentils are as soft as you prefer and flavors are well blended.
  7. Season with salt and fresh-ground black pepper and serve hot.

cropped image of Sausage and Lentil Soup with soup in two bowls on napkin

More Tasty Soup with Lentils:

For everyone who’s also a fan of soup with lentils, there’s a great collection of Slow Cooker and Instant Pot Lentil Soups on my Slow Cooker or Pressure Cooker site!

Weekend Food Prep:

This recipe has been added to a category called Weekend Food Prep where you’ll find recipes you can prep or cook on the weekend and eat during the week!

Lentil Soup with Sausage and Roasted Red Pepper finished soup in serving bowls
Yield: 6 servings

Sausage and Lentil Soup

Prep Time 15 minutes
Cook Time 1 hour 30 minutes
Total Time 1 hour 45 minutes

Sausage and Lentil Soup is one of my favorite lentil soup recipes, and this makes a great cold weather meal. And there's a lot of sausage and red peppers and not too many lentils, so this is surprisingly low in carbs for a soup with lentils!

Ingredients

  • 1 package (19.5 oz.) Italian Sausage (see notes)
  • 2 tsp. olive oil (or more, depending on your pan)
  • 1 onion, diced into small pieces
  • 1 cup brown lentils
  • 6 cups chicken broth (see notes)
  • 2 tsp. ground fennel (do not leave out)
  • 1 tsp. dried thyme
  • 1 tsp. rubbed sage (dried)
  • 1 12 oz. jar roasted red peppers

Instructions

  1. Heat olive oil in heavy frying pan, add Italian sausage and brown well, breaking sausage into pieces as it cooks. (I like to use an old-fashioned Potato Masher (affiliate link) to break the meat apart.)
  2. Add sausage to soup pot.
  3. In same pan, adding more oil if needed, brown onions until softened and barely starting to brown.
  4. Add onions to soup pot.
  5. Rinse out pan with 1 cup chicken broth, then add to soup pot along with rest of broth, lentils, ground fennel, thyme, and sage.
  6. Cook at lowest possible simmer for about 45 minutes, until lentils are softened, but still holding their shape.
  7. Drain the roasted red peppers while the soup simmers, then chop into pieces about 1/2 inch square.
  8. Add red pepper to soup and cook about 45 minutes more (adding a little more broth or water if needed), until some lentils are starting to fall apart and all flavors are well blended.
  9. Season with salt and fresh ground black pepper and serve hot.

Notes

If you only find Italian Sausage in a one pound package, that will be fine. Use turkey or pork Italian sausage. whichever you prefer. Use sweet or hot Italian sausage.

Homemade chicken stock would be great for this recipe, but if you don't have that just use 3 cans chicken broth plus a little water.

Recipe created by Kalyn.

Nutrition Information

Yield

6

Serving Size

1
Amount Per Serving Calories 147Total Fat 7gSaturated Fat 2gTrans Fat 0gUnsaturated Fat 5gCholesterol 12mgSodium 1019mgCarbohydrates 14gFiber 4gSugar 5gProtein 8g

Nutrition information is automatically calculated by the Recipe Plug-In I am using. I am not a nutritionist and cannot guarantee 100% accuracy, since many variables affect those calculations.

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© Kalyn Denny
Category: Soups & Stews
square image of Sausage and Lentil Soup in two serving bowls

Low-Carb Diet / Low-Glycemic Diet / South Beach Diet Suggestions:
This lentil soup has a lot of sausage and red peppers and only a small amount of lentils, so it should work for low-carb diets, but probably not for strict Keto. With turkey Italian Sausage, this would be acceptable for any phase of the original South Beach Diet.

Find More Recipes Like This One:
Use Soup Recipes to find more recipes like this one. Use the Diet Type Index to find recipes suitable for a specific eating plan. You might also like to follow Kalyn’s Kitchen on Pinterest, on Facebook, on Instagram, on TikTok, or on YouTube to see all the good recipes I’m sharing there.

Historical Notes for This Recipe:
This delicious lentil soup with sausage was first posted in 2007 and I’ve enjoyed it so many times since then.  Photos were updated January 2015, and the recipe was last updated with more information and a lower-carb version in 2025.

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