In a small saucepan or microwave-safe bowl, combine beans, corn and vinegar.
Cook over moderate heat, or microwave covered, until heated through.
Sprinkle with onions.
Nutritional Information:
84 Calories (kcal); 1g Total Fat; (9% calories from fat); 3g Protein; 20g Carbohydrate; 0mg Cholesterol; 14mg Sodium