Prepare the Garlic Butter Mixture by blending unsalted butter, minced garlic, grated Pecorino Romano cheese, and chopped Italian parsley in a small bowl.

Butter one side of each slice of bread with the garlic butter mixture.

Assemble the sandwich with 2 slices of buttered bread, 2 slices of American cheese, and top with another slice of buttered bread.

Heat the non-stick skillet over medium heat.

Cook the sandwiches in the skillet for about 3-4 minutes until the bottom is golden brown.

Flip the sandwiches and cook the other side for an additional 3-4 minutes.

Let the sandwiches rest for a minute before slicing and serve warm.