Taste the tradition of Mexico- now vegetarian- with Rosarita Vegetarian Refried Beans. When you serve Rosarita refried beans, you're giving your family delicious, Mexican flavors. On the stovetop, heat the beans over medium heat in a saucepan until hot, stirring occasionally or microwave in a covered microwave-safe dish on high for one and one-half minutes or until hot. Rosarita Vegetarian Refried Beans have 120 calories per serving with zero fat.