Grease a 12-cup muffin tin with non-stick cooking spray.
Unroll the refrigerated pizza crust and slice in 12 even sections using a pizza cutter.
Take one piece of the dough and flatten out in the palm of your hand. Press the dough into a muffin cup, pressing it up the sides as much as you can. Repeat until each muffin tin is filled with dough, set aside.
In a small bowl, combine the melted butter, garlic salt and Italian seasoning. Using a pastry brush, spread the butter mixture over the dough.
Put 1-2 tablespoons of pizza sauce into each dough cup. *If the dough slides down the sides, adjust as necessary.
Sprinkle your pizza toppings, except the cheese.
Bake the pizza muffins for 15 minutes.
Add 1-2 tablespoons of cheese on top of each pizza muffin and continue to bake for 10 minutes or until the cheese is browned and bubbly.