Cook the pasta according to the package directions until al dente, then drain and set aside.
16 oz penne pasta
In a large skillet over medium-high heat, warm the olive oil. Add the sliced sausage and cook for about 5 minutes until the slices are browned on both sides. Transfer to a bowl and cover with foil to keep warm.
2 tablespoon olive oil, 2 lb smoked sausage
Add the onion to the skillet and sauté for about 3 minutes until translucent. Stir in the garlic and cook for 1 minute until fragrant.
1 onion, 4 cloves garlic
Add the diced red and yellow bell peppers, cooking for another 5 minutes until they begin to soften.
1 red bell pepper, 1 yellow bell pepper, 1 green bell pepper
Add in the remaining ingredients, except for the cheese, and return the sausage to the skillet.
1 28-ounce can diced tomatoes, 1 cup heavy cream, 1 cup chicken broth, 2 teaspoons dried oregano, 2 teaspoons dried basil, ¼ teaspoon crushed red pepper flakes, kosher salt, black pepper
Bring the sausage mixture to a simmer and let it cook for 5-7 minutes until the sauce slightly thickens.
Add the cooked pasta and toss until evenly coated in the sauce.
Stir in the grated Parmesan cheese and cook for 2-3 minutes until melted and the pasta is heated through.
1 cup grated Parmesan cheese
Taste and add additional salt or pepper as needed. Serve hot, garnished with fresh parsley.
2 tablespoons chopped fresh parsley