Butter slice of bread on one side and place butter side down in the pan. Top with mozzarella, pepperoni and garlic salt.
Place the second piece of bread on top and butter top. Cook both sides for 3-4 minutes or until golden brown and cheese is melted.
Serve hot with a side of pizza sauce for dipping.
Notes
For a 'panini’ style sandwich, press down on the sandwich with a spatula.
Add a teaspoon of water to the skillet and cover it with a lid. The steam is so hot, that it will melt the cheese without burning the bread. Then remove the lid so the bread has a chance to get crisp.
Alternately place multiple sandwiches under the broiler for a couple of minutes.
Prep pizza sandwiches ahead and keep them chilled until ready to grill