* Freshly grated Cook bacon in large saucepan until crisp; drain on paper towel. Discard all but 1 tablespoon drippings from skillet. Add onion and red pepper flakes; cook over medium heat, stirring occasionally, until tender, about 5 mins. Add marinara sauce and bring to a boil. Meanwhile, in a mixer bowl, beat ricotta, Parmesan, salt and pepper until creamy. Stir in parsley. Toss pasta immediately with marinara sauce and bacon. Pass ricotta. Per serving: 725 Calories; 33g Protein; 20g Fat; 103g Carbohydrates; 1,246mg Sodium; 44mg Cholesterol.