1 cup Shredded mozzarella
1 cup Marinara
4 Hero rolls, sliced lengthwise
1/2 pound Ground pork
1 pound Ground beef
Freshly ground black pepper
Kosher salt
2 tbsp. Ketchup
1 Large egg
1/2 cup Freshly grated Parmesan, divided
3/4 cup Bread crumbs
1 cup Freshly chopped parsley
2 cloves Garlic, minced
1/2 cup Diced onion
1/2 cup Diced carrots
1/2 cup Diced celery