Cook tortellini as directed on package; drain. Heat margarine in 3-quart saucepan over medium heat. Cook bell pepper, shallots and garlic in margarine about 3 minutes. Stir in flour and pepper. Cook, stirring constantly, until mixture is bubbly; remove from heat. Stir in milk. Heat to boiling, stirring constantly. Boil and stir 1 minute; remove from heat. Stir in mozzarella and Swiss cheeses until melted. Add tortellin and stir until coated. Sprinkle with Parmesan cheese. 5 Servings (About 1 Cup Each); 390 Calories Per Serving.