Creating a Grilled Mozzarella Sandwich is a simple task if you follow these easy steps:

1. Heat the Pan: Preheat a non-stick skillet over medium heat.
2. Prepare the Bread: Spread butter evenly on one side of each slice of bread.
3. Assemble the Sandwich: On the unbuttered side of one slice, layer the mozzarella cheese. Sprinkle with salt and pepper. Add any optional ingredients like basil or tomato, then place the second slice of bread on top, butter-side up.
4. Grill the Sandwich: Carefully place the sandwich in the preheated skillet. Grill for about 3-4 minutes until the bottom is golden brown.
5. Flip the Sandwich: Gently flip the sandwich using a spatula. Grill the other side for another 3-4 minutes until the cheese is melted and the bread is crispy.
6. Check for Doneness: Ensure both sides are golden brown and the cheese has melted thoroughly. If necessary, lower the heat and allow the cheese to continue melting while the bread crisps up.
7. Serve: Remove the sandwich from the skillet and let it cool for a minute. Cut it in half diagonally for visual appeal, making it easy to serve.

By following these simple instructions, you will create a delicious Grilled Mozzarella Sandwich in no time!