grated Parmesan cheese
grated sharp Cheddar cheese
Split panini buns length-wise generously spread each half of the buns with butter all the way to the edges and sprinkle with garlic salt to taste. Put on generous amounts of fresh grated Parmesan cheese and grated sharp Cheddar cheese.
Broil in oven until cheese bubbles and browns. Serve with your favorite spaghetti sauce.