Start with the breaded shrimp (see recipe for directions).
Preheat oven to 425F or set your broiler to low. Scoop out the inside of the bread to make a longer hero, making sure after its scooped each piece is 3 oz.
When shrimp is cooked, divide shrimp equally between 4 pieces of bread.
Top each sandwich with marinara and shredded mozzarella cheese.
Place sandwiches on a sheet pan and heat in the oven or broiler until the cheese melts; 2 - 3 minutes, careful not to burn if using the broiler.