Waffle Iron Grilled Cheese

In a small bowl, combine the mayonnaise and butter. Arrange the bread in a single layer on a work surface. Spread mayonnaise mixture onto the top side of each slice. Flip two slices of the bread, so it’s mayonnaise mixture side down. Top each bread with a slice of American cheese, half the Monterey jack cheese, and half the cheddar cheese. Sandwich with the remaining slice of bread, mayonnaise side up.   Heat a waffle iron over medium heat. Grease waffle iron with cooking spray. Carefully, add one sandwich to the waffle iron. Close waffle iron, and cook until cheese is melted and the bread is golden, about 3 minutes. Remove carefully and repeat with the remaining sandwich.