White Pizza Grilled Cheese

Melt butter in a nonstick skillet over medium heat. Cook and stir onion until starting to brown about 5 minutes. Transfer to a plate.

Mix remaining 1 tablespoon butter rosemary onion powder garlic powder salt and pepper in a small bowl. Spread on one side of each slice of bread.

Place 1 slice of bread buttered-side down in the skillet. Top with onion mozzarella cheese American cheese and provolone cheese. Cover with second slice of bread buttered-side up. Cook until golden brown about 3 minutes. Flip with a spatula; cook until second side is browned and cheeses are melted about 3 minutes more.