Two fantastic foods become one.
Heat a large skillet over medium heat.
Combine butter, parsley, Pecorino Romano cheese, and garlic in a small bowl. Stir to combine.
Lightly coat 1 side of each bread slice with the butter mixture. Flip bread and top 2 slices evenly with provolone cheese and mozzarella cheese. Cover with remaining bread slices, buttered-sides up.
Place sandwiches into the hot skillet. Cook until golden brown on one side, 3 to 4 minutes. Flip and cook until golden brown on the second side and cheese has melted, 3 to 4 minutes more. Cut each sandwich in half and serve.
Per Serving: 625 calories; protein 26.8g; carbohydrates 28.2g; fat 45.3g; cholesterol 122.1mg; sodium 1062.2mg.