Preheat the oven to high broil. Mix the butter, garlic, Asiago, Parmesan, Romano and parsley in a medium bowl until completely combined. Spoon some of the mixture on one side of the bread slices and put on a baking sheet, butter side up.
Broil until bread is toasted and cheese mixture is bubbling, 3 to 5 minutes. Serve hot.
Recipe courtesy of Nancy Fuller