1. Stir together butter and Parmesan cheese in a small bowl. 2. Spread 1 & 1/2 tsp butter mixture on 1 side of each bread slice. 3. Place 4 bread slices, buttered sides down, on wax paper. Top with provolone and mozzarella cheeses; top with remaining bread slices, buttered sides up. 4. Cook sandwiches in batches, on a hot griddle or in a non-stick skillet over medium heat, gently pressing with a spatula, 4 minutes on each side or until golden brown and cheese is melted. 5. (Optional) Pour sauce of choice into a dipping bowl, serve and enjoy.
