1 pound ground sirloin
1 egg, beaten
1/4 small yellow onion, finely chopped or grated with hand grater
2 cloves garlic, chopped
1/2 cup grated parmesan or Romano cheese
1/2 cup store-bought Italian bread crumbs
Salt and black pepper, to taste
2 tablespoons fresh flat leaf parsley, chopped
1 tablespoon extra virgin olive oil (EVOO)
1 tablespoon butter
8 slices Italian bread, such as semolina bread
8 deli slices provolone cheese
2 cups pizza or marinara sauce