To prepare a tortellini with sausage and peppers recipe, you first need to prepare the sausage. You can buy sausage at your local grocery store, or you can make your own at home. Heat 2 tablespoons of olive oil over medium-high heat. Add sausage to the oil and cook, stirring frequently, until browned on all sides, about 5 minutes. Remove sausage from the pan and set aside. In the same skillet, add 1 chopped red bell pepper. Cook until softened, 2 to 3 minutes more. Stir in 1 tablespoon of red pepper flakes, 1 teaspoon of oregano, and 1 tsp. kosher salt. Toss tossed sausage mixture with the ricotta cheese and 1/4 cup of Parmesan cheese. Serve immediately.