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 |