Combine Ground Beef, bread crumbs, 1/4 cup cheese, egg whites, water, 1 clove garlic, salt and pepper in large bowl, mixing lightly but thoroughly. Shape into 12 two-inch meatballs. Heat large nonstick skillet over medium heat until hot. Place meatballs in skillet; cook 5 to 8 minutes or until browned on all sides.
Add remaining 2 cloves garlic, tomatoes and potatoes; bring to a boil. Reduce heat; cover and simmer 20 to 25 minutes and until potatoes are tender. Uncover; continue simmering about 5 minutes or until sauce is slightly thickened, stirring occasionally. Season with salt and pepper, as desired.
Sprinkle meatballs with cheese, if desired, before serving.
Nutrition information per serving: 409 Calories; 81 kcal Calories from fat; 9 g Total Fat; 4 g Saturated Fat; 3 g Monounsaturated Fat; 8 mg Cholesterol; 1669 mg Sodium; 46 g Total Carbohydrate; 4.1 g Dietary Fiber; 36 g Protein; 7 mg Iron; 8.5 mg Niacin; 0.7 mg Vitamin B6; 2.4 mcg Vitamin B12; 6.8 mg Zinc; 24.9 mcg Selenium;