PREHEAT oven to 350º F. Line baking sheet with sides with foil.
COMBINE sausage and breadcrumbs in large bowl. Form mixture into 60, 1-inch meatballs. Place on prepared baking sheet.
BAKE for 15 minutes or until no longer pink. Drain meatballs on papertowel-lined plates.
MEANWHILE, COMBINE marinara sauce, evaporated milk and red pepper flakes in large saucepan. Cook over medium heat, stirring occasionally, for 10 minutes or until simmering. Add meatballs; stir.
SERVE half the sauce and meatballs over cooked spaghetti. Top with parsley, if desired.
• Freeze the remaining sauce and meatballs for another meal. Thaw in refrigerator and reheat in microwave or on stovetop. Serve with pasta of your choice.