Heat olive oil in a large skillet over medium heat. Add the sliced sausages and cook until browned on both sides, about 4-5 minutes. Remove from the pan with a slotted spoon and set aside.
1 tablespoon olive oil, 12 ounces chicken sausage
Add butter to the pan you cooked the sausage in. Add the red pepper, onion, and garlic and season with salt and pepper. Sauté until the onion is translucent, about 5-7 minutes.
2 tablespoons unsalted butter, 1 red pepper, 1 small yellow onion, 2 cloves garlic, 1/2 teaspoon kosher salt, dash black pepper
Whisk in the flour until the veggies are fully coated and no white streaks are left. Slowly stir in the wine, a few tablespoons at a time, and scrape up the browned bits as you go, adding more once what you have added has been absorbed. Go slowly, but no need to spend more than a minute on this.
2 tablespoons all purpose flour, 1/2 cup white wine
Add the chicken stock and noodles and cover. Bring to a boil and then reduce to a simmer and cook for 14 minutes. Stir in the heavy cream and spinach, allowing the spinach to wilt. Taste the sauce and add more salt and pepper if needed. I typically add about 1/4 to 1/2 teaspoon of kosher salt and another dash of black pepper here. Return the sausage to the pan.
3 cups chicken broth, 1/2 pound rigatoni pasta, 1/4 cup heavy cream, 3 cups spinach
Remove the pan from the heat and add tomatoes. Garnish with freshly grated Parmesan cheese and freshly chopped parsley.
1 roma tomato, fresh parsley, Parmesan cheese