Creating the perfect Grilled Mozzarella Sandwich is straightforward if you follow these steps:

1. Prep the Ingredients: Gather all your ingredients on a clean surface.
2. Butter the Bread: Spread a thin layer of butter on one side of each slice of bread.
3. Add Cheese: Place one slice of bread, buttered side down, onto a preheated skillet. Layer the mozzarella slices evenly on top.
4. Add Seasoning: Sprinkle salt, pepper, and fresh basil leaves over the mozzarella if desired.
5. Top with Bread: Place the second slice of bread on top, buttered side up.
6. Grill: Cook on medium heat for about 3-4 minutes until the bottom is crispy and golden brown.
7. Flip the Sandwich: Carefully flip the sandwich using a spatula and grill the other side for an additional 3-4 minutes until golden and the cheese has melted.
8. Check for Doneness: Press gently on the sandwich; it should feel firm and the cheese inside should be gooey.
9. Remove and Cool: Once cooked, remove from the pan and let it sit for a minute before slicing.
10. Serve: Cut the sandwich in half and enjoy while still warm.