The ultimate cozy weeknight comfort meal! Savory, juicy Italian sausage links and a vibrant blend of sweet bell peppers and onions slow-cook to perfection inside an incredibly rich, seasoned marinara sauce.
This recipe is built for minimum effort and maximum flavor. As everything simmers low and slow, the natural juices from the sausages meld into the tomato sauce, while the peppers and onions break down into tender, sweet ribbons that pair beautifully with crusty bread, pasta, or rice.
⏱️ Recipe Overview
- Prep Time: 10 minutes
- Cook Time: 5–6 hours on LOW (or 3 hours on HIGH)
- Total Time: Approx. 5 hours 10 minutes
- Servings: 5 to 6 people
🛒 Ingredients Checklist
- 5 to 6 links (approx. 19-24 oz): Sweet or hot Italian sausage links (raw)
- 3 large: Bell peppers (a colorful mix of red, green, and orange or yellow), cored and sliced into strips
- 1 large: Yellow or white onion, halved and sliced into strips
- 1 jar (24 oz): High-quality marinara or pasta sauce
- 2 cloves: Garlic, finely minced
- 1 tsp: Italian seasoning blend
- 1/2 tsp: Garlic powder
- To taste: Salt and freshly cracked black pepper
- Optional for serving: Hoagie rolls, shredded provolone or mozzarella cheese, or cooked pasta
👩🍳 Step-by-Step Instructions
Step 1: Layer the Base
- Lightly spray the inside of your slow cooker insert with non-stick cooking spray for easy cleanup.
- Pour about half of the jar of marinara sauce directly into the bottom of the cooker.
- Add the sliced bell peppers, sliced onions, and minced garlic into the pot, spreading them into an even layer over the sauce.
Step 2: Nest the Sausages
- Arrange the raw Italian sausage links in a single layer directly on top of the bed of peppers and onions.
- Pour the remaining marinara sauce evenly over the sausages.
- Evenly sprinkle the Italian seasoning, garlic powder, salt, and freshly cracked black pepper across the top.
Step 3: Low and Slow Cooking
- Secure the heavy glass lid tightly onto your slow cooker.
- Set the appliance to cook on LOW for 5 to 6 hours (preferred method to keep the sausages incredibly tender) or on HIGH for 3 hours. The dish is ready when the sausages are completely cooked through (internal temperature of 160°F / 71°C) and the peppers are completely tender.
Step 4: Garnish and Serve Hot
- Turn off the heat. Use a large spoon to gently stir the sauce, coating the sausages thoroughly in the rich juices that accumulated during cooking.
- To serve sandwich-style: Split open crusty hoagie rolls, tuck a juicy sausage link inside each, pile high with the tender peppers and onions, and top with a slice of provolone cheese. Pop under the oven broiler for 1–2 minutes until the cheese is melted and bubbling!
- To serve over pasta or rice: Spoon the sausage, peppers, and plenty of the rich sauce directly over a bed of hot penne, rigatoni, or white rice.