Chicken Parmesan Heroes

Name: Chicken Parmesan Heroes
Ingredients: 1/2 cup dry bread crumbs; 1/2 cup grated Parmesan; 1 1/4 teaspoons kosher salt; 1/2 teaspoon freshly ground black pepper; 3 tablespoons olive oil; 1 onion, minced; 2 cloves garlic, minced; 2 1/3 cups canned crushed tomatoes in thick puree (from a 28-ounce can); Pinch dried red-pepper flakes (optional); Cooking oil, for frying; 4 boneless, skinless chicken breasts (about 1 1/3 pounds in all); 2 eggs, beaten to mix; 4 small (about 6 inches) hero or other sandwich rolls, split; 4 (1-ounce) slices mozzarella cheese