Quick Recipe Version (TL;DR)
Quick Ingredients
- 2 lb sweet/hot Italian sausage links
- 1 tbsp olive oil
- 2 medium yellow onions, thinly sliced
- 3 bell peppers (red, yellow, green), thinly sliced
- 5 garlic cloves, sliced
- 1.5 tsp fennel seed, lightly crushed
- 2 tbsp tomato paste
- 1/2 cup dry white wine (or chicken broth)
- 1 can (28 oz) crushed tomatoes
- 1/2 cup low-sodium chicken broth
- 1 tsp dried oregano, 1 bay leaf, 1/2 tsp red pepper flakes (optional)
- 1.25–1.5 tsp kosher salt, 1 tsp black pepper
- 1/3 cup heavy cream; 1/2 cup torn fresh basil
- Polenta: 1 cup coarse polenta, 4 cups water, 1 cup whole milk, 3 tbsp butter, 1/2 cup finely grated Parmesan, 3/4 tsp kosher salt
Do This
- 1. Brown sausage in 1 tbsp olive oil over medium-high heat until deeply browned, 6–8 minutes; transfer to slow cooker.
- 2. Sauté onions and peppers in the same pan with a pinch of salt, 5 minutes. Stir in garlic, fennel seed (30 seconds), then tomato paste (1 minute). Deglaze with wine; reduce by half.
- 3. Add veg mixture to slow cooker with crushed tomatoes, broth, oregano, bay leaf, red pepper flakes, salt, and pepper. Nestle sausage in; cover.
- 4. Cook on LOW 6 hours (or HIGH 3–4 hours) until onions/peppers are silky and sausage is tender.
- 5. Finish ragù: remove bay leaf; break sausage into bite-size pieces. Stir in heavy cream and torn basil; adjust seasoning.
- 6. 30 minutes before serving, cook polenta (water + milk to simmer, whisk in polenta, cook 25–30 minutes). Finish with butter and Parmesan. Serve ragù over polenta; garnish with basil.
Why You’ll Love This Recipe
- Hands-off slow cooker comfort: deep, developed flavor with minimal effort.
- Classic Italian sausage-and-peppers vibe, elevated with fennel, basil, and a silky splash of cream.
- Buttery, Parmesan-laced polenta catches every drop of lush ragù.
- Meal-prep friendly—ragù freezes beautifully and reheats like a dream.
Grocery List
- Produce: 2 yellow onions, 3 bell peppers (red, yellow, green), 5 garlic cloves, fresh basil
- Dairy: Heavy cream, whole milk, unsalted butter, Parmesan cheese
- Pantry: Italian sausage, olive oil, crushed tomatoes (28 oz), tomato paste, chicken broth, dry white wine (or extra broth), coarse polenta (cornmeal), fennel seed, dried oregano, red pepper flakes, bay leaf, kosher salt, black pepper, sugar (optional)
Full Ingredients
For the Sausage & Peppers Ragù
- 2 lb (900 g) sweet and/or hot Italian sausage links
- 1 tbsp extra-virgin olive oil
- 2 medium yellow onions (about 1 lb/450 g), thinly sliced
- 3 large bell peppers (1 red, 1 yellow, 1 green), seeded and thinly sliced
- 5 garlic cloves, thinly sliced
- 1.5 tsp fennel seed, lightly crushed
- 2 tbsp tomato paste
- 1/2 cup (120 ml) dry white wine, or chicken broth
- 1 can (28 oz/800 g) crushed tomatoes
- 1/2 cup (120 ml) low-sodium chicken broth
- 1 tsp dried oregano
- 1 bay leaf
- 1/2 tsp red pepper flakes (optional, adjust to taste)
- 1.25–1.5 tsp kosher salt, plus more to taste
- 1 tsp freshly ground black pepper
- 1/2 tsp sugar (optional, to balance acidity)
- 1/3 cup (80 ml) heavy cream
- 1/2 cup loosely packed fresh basil leaves, torn, plus more for serving
For the Buttery Parmesan Polenta
- 4 cups (960 ml) water
- 1 cup (240 ml) whole milk
- 1 cup (170 g) coarse stone-ground polenta (not instant)
- 3/4 tsp kosher salt, plus more to taste
- 3 tbsp (42 g) unsalted butter
- 1/2 cup (40 g) finely grated Parmesan cheese
- Black pepper, to taste
For Serving (Optional)
- Extra torn basil
- Extra Parmesan
- Drizzle of olive oil and freshly ground black pepper
Step-by-Step Instructions
Step 1: Brown the sausage
Heat a large skillet over medium-high heat. Add the olive oil, then the sausage links. Brown well on all sides until deeply caramelized, 6–8 minutes total. Transfer the browned sausages and any juices to the slow cooker. Tip: If using bulk sausage, form into 6–8 rough chunks and brown on two sides for about 2–3 minutes per side before transferring.
Step 2: Sauté the aromatics and deglaze
In the same skillet, lower heat to medium. Add the onions and peppers with a pinch of salt and cook, stirring, until starting to soften and pick up color, about 5 minutes. Stir in the garlic and crushed fennel seed; cook until fragrant, 30 seconds. Add the tomato paste and cook, stirring, 1 minute. Pour in the white wine (or broth) and scrape up all browned bits; simmer until reduced by about half, 1–2 minutes. Transfer the mixture to the slow cooker.
Step 3: Load the slow cooker
Add the crushed tomatoes, chicken broth, dried oregano, bay leaf, red pepper flakes (if using), kosher salt, black pepper, and sugar (if needed) to the slow cooker. Stir to combine, then nestle the sausage into the sauce. Cover.
Step 4: Slow cook until silky
Cook on LOW for 6 hours (or HIGH for 3–4 hours) until the onions and peppers are very tender and the sausage is cooked through and spoon-tender. If the sauce looks thin near the end, set the lid slightly ajar and cook on HIGH for 15–20 minutes to reduce. If too thick, add a splash of broth.
Step 5: Finish the ragù with cream and basil
Discard the bay leaf. Use tongs to cut or break the sausage into bite-size pieces (or slice the links). Stir in the heavy cream and torn basil. Taste and adjust salt, pepper, and red pepper flakes. Keep warm on the WARM setting while you make the polenta.
Step 6: Cook the buttery Parmesan polenta
About 30 minutes before serving, bring the water and milk to a bare simmer in a medium saucepan. Whisk in the polenta in a steady rain, then add the salt. Reduce heat to low and cook, whisking frequently at first and stirring often, until thick and creamy with a gentle bubble, 25–30 minutes. Off heat, stir in the butter and Parmesan; season with additional salt and black pepper to taste. If it thickens too much, whisk in hot water or milk to loosen to a soft, spoonable consistency.
Step 7: Serve
Spoon polenta into warm bowls. Ladle the sausage and peppers ragù over the top. Garnish with extra torn basil, a drizzle of olive oil, more Parmesan, and freshly ground black pepper. Serve immediately.
Pro Tips
- Brown deeply: That fond in the pan is flavor gold—don’t rush the initial sear on the sausage.
- Lightly crush fennel seeds with the side of a knife or a mortar to release aroma without turning them to powder.
- Balance acidity: A small pinch of sugar or a pat of butter can soften sharp tomatoes if needed.
- Dial the heat: Use all sweet sausage for a milder ragù, or mix 50/50 with hot sausage and a pinch of red pepper flakes for warmth.
- Perfect polenta texture: Keep it low and slow, stir often, and thin with hot water or milk right before serving to keep it luxuriously spoonable.
Variations
- Rigatoni night: Toss the finished ragù with al dente rigatoni and a splash of pasta water; finish with basil and Parmesan.
- Gorgonzola polenta: Swap half the Parmesan with 2 oz crumbled gorgonzola for a bold, creamy base.
- Provolone melts: Pile ragù into toasted rolls, top with provolone, and broil until bubbly for a sausage-and-peppers sub.
Storage & Make-Ahead
Ragù keeps refrigerated up to 4 days or frozen up to 3 months. Cool completely, pack in airtight containers, and label. Reheat gently on the stovetop until steaming, adding a splash of broth if needed. Polenta is best fresh, but leftovers can be poured into a shallow dish to set; slice and pan-fry, or rewarm with extra hot water/milk, whisking until smooth. For make-ahead ease, brown the sausage and sauté the aromatics up to 24 hours in advance; refrigerate, then load the slow cooker in the morning.
Nutrition (per serving)
Approx. 700 calories; 48 g fat; 34 g carbohydrates; 4 g fiber; 29 g protein; 1180 mg sodium. Nutrition will vary with sausage brand and seasoning.
