I love onions and think these will be excellent on plain burgers without the buns!
Ingredients
Ingredients
- 2 - 3 whole sweet onions, sliced into 1/4- to 1/2-inch rings
- 4 tablespoons butter, cut into small pieces
- garlic salt or garlic powder, to taste
- 1 cup shredded sharp cheddar cheese
- 1 cup shredded mozzarella
- 1/2 cup grated Parmesan
- Spray a 13x9-inch baking pan with nonstick cooking spray. Arrange the onions in the pan. Sprinkle the onions with garlic salt or garlic powder and black pepper, to taste. Dot the top with the butter. Sprinkle with the cheeses.
- Bake in a preheated 350-degree F oven for about 30 minutes or until cheese is bubbly and casserole has started to brown.