Ingredients:
- 6 (2-ounce) whole wheat submarine loaves
- 1 pound ground round
- 1/4 cup finely chopped onion
- 3 tablespoons Italian-seasoned breadcrumbs
- 2 tablespoons water
- 1/4 teaspoon pepper
- 1 large egg white, lightly beaten
- 1 1/2 cups low-fat, reduced-sodium pasta sauce
- 3/4 cup (3 ounces) shredded part-skim mozzarella cheese

