Slow Cooker Sausage and Peppers with Onions and Tomato Sauce

Easy to make, this recipe for Crockpot Sausage and Peppers is a family favorite. Just dump and go—Italian sausages cook slowly with peppers, onions, garlic, and crushed tomatoes for a simple, flavorful meal everyone will enjoy.

An Italian Sausage with peppers and onions in a bun topped with fresh basil and grated parmesan cheese.

Slow Cooker Italian Sausage and Peppers

This is the kind of dinner that saves busy nights. If you have afternoon time to prep, throw everything in the crockpot and come home to a hot, satisfying meal. It’s perfect for busy families with after-school activities or sports—set it up before games and eat right away when you get home.

If you prefer a shorter cook time, set the crockpot to HIGH for 2–3 hours and it will still turn out great. It’s also ideal for weekend days when you want to be out and about but want to come home to something delicious and ready.

Overhead view of a bunch of buns filled with Italian sausages and peppers sitting next to a crockpot with more sausage.

Ingredients

  • Crushed tomatoes (28 oz) – Look for “kitchen ready” crushed tomatoes. A large can works best; flavored varieties (basil, Italian) are fine.
  • Garlic – 2 cloves, minced.
  • Dried oregano – 1 teaspoon for extra flavor.
  • Salt – 1 teaspoon kosher or sea salt (use half the amount if using table salt).
  • Black pepper – Pinch or to taste.
  • Italian sausages – 2 pounds (about 10 sausages). Use hot, mild, or sweet depending on preference.
  • Green, yellow, and red bell peppers – One medium of each, deseeded and sliced.
  • Sweet onion – One large, sliced (Valencia or sweet onion preferred).
  • Basil leaves – 1/4 cup, sliced, for garnish.
  • Parmesan cheese – 1/4 cup shredded, for topping.
  • Sub rolls or cooked pasta – For serving, or serve on their own with sides.

For the full ingredient list, see the recipe card below.

Ingredients for making crockpot sausage and peppers laid out on a tabletop.

Pro Tip

Preheat the crockpot before you add ingredients. Turn it on LOW while you prep so the pot is already warm when you add everything—this helps the cooking start immediately.

Instructions

Add all ingredients to the crockpot except the basil and parmesan. Stir gently to combine, cover, and cook on LOW for 4–5 hours or on HIGH for 2–3 hours, until sausages are cooked through and vegetables are tender but not mushy.

Overhead view of a crockpot with uncooked ingredients for sausage and peppers including Italian sausages, sliced bell pepper, and crushed canned tomatoes.

Serve on sub rolls or over cooked pasta. Garnish with fresh basil and a sprinkle of parmesan cheese.

Overhead view of freshly cooked Italian sausages in the crockpot with sliced bell peppers and onions.

Tips, Tricks and Questions

Don’t overcook. Avoid cooking longer than 5 hours on LOW; beyond that sausages can dry out and peppers and onions may become mushy.

Should I brown the sausages first? You can brown them for extra color and flavor, but it’s not necessary—this recipe is designed for minimal prep.

Do I need to add extra liquid? No. The crushed tomatoes plus the juices released from the peppers and onion provide enough liquid.

What to serve with this? Sub rolls or cooked pasta are classic choices. It also pairs well with steamed vegetables, a simple salad, or roasted potatoes.

Close up view of an Italian sausage in a bun with peppers and onions.

If you like this Crockpot Sausage and Peppers recipe you might also enjoy:

  • Easy Crockpot Carnitas
  • Slow Cooker Chicken Shawarma
  • Crockpot Gumbo
  • Slow Cooker Pot Roast made with Red Wine
  • Slow Cooker Cuban Mojo Pork
  • Easy Weeknight Sausage & Pepper Pasta
  • Chicken Sausage Tortellini Soup

What to Serve With This

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Yield: 10 servings

Crockpot Sausage and Peppers

Overhead view of a bunch of sausages in buns on a cutting board.

This dump-and-go recipe is ideal for busy nights—add the ingredients to the slow cooker and dinner will be ready in a few hours.

Prep Time
5 minutes
Cook Time
4–5 hours (LOW)
Total Time
4–5 hours + 5 minutes

Ingredients

  • 1 can (28 ounces) crushed tomatoes (‘kitchen ready’)
  • 2 cloves garlic, minced
  • 1 teaspoon dried oregano
  • 1 teaspoon kosher or sea salt
  • Pinch coarse black pepper
  • 2 pounds Italian sausages (about 10 sausages)
  • 1 green bell pepper, deseeded and sliced
  • 1 yellow bell pepper, deseeded and sliced
  • 1 red bell pepper, deseeded and sliced
  • 1 large sweet onion, sliced
  • 1/4 cup sliced basil leaves
  • 1/4 cup shredded parmesan cheese
  • Sub rolls or cooked pasta for serving

Instructions

  1. Add everything but the basil and parmesan to the crockpot. Stir gently to combine. Cover and cook on LOW for 4–5 hours or on HIGH for 2–3 hours, until sausages are fully cooked and vegetables are tender.
  2. Serve on rolls or over pasta. Garnish with fresh basil and parmesan.

Notes

This meal should not be overcooked. Limit to about 5 hours on LOW to keep sausages juicy and peppers and onions from becoming mushy.

Nutrition Information:

Yield:

10

Serving Size:

1 sausage with peppers

Amount Per Serving:
Calories: 344
Total Fat: 25g
Saturated Fat: 10g
Cholesterol: 53mg
Sodium: 924mg
Carbohydrates: 10g
Fiber: 1g
Sugar: 5g
Protein: 19g

Nutritional data is automated and may not be 100% accurate; final values depend on ingredients and preparation.

© Lauren Schmidt
Cuisine: American
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Category: Crockpot

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