BACON CHEESEBURGER GRILLED CHEESE CASSEROLE - Skinny Daily Recipes

Ingredients

• 1 lb lean ground beef
• 1 small yellow onion, diced
• 1/2 cup bacon, cooked and chopped
• 1/4 cup mayonnaise
• 1/4 cup ketchup
• 1 tablespoon yellow mustard
• 1 tablespoon sweet pickle relish
• 2 teaspoons onion powder
• 2 cups mozzarella cheese, grated
• 2 cups cheddar cheese, grated
• Kosher salt and freshly ground black pepper, to taste
• 12 slices white bread
• 1/2 cup (1 stick) butter, softened