Preheat oven to 400°.

In a small bowl, mix butter, Asiago cheese, cheddar jack cheese, mayonnaise, green onions and garlic until well blended.

Cut French bread in half horizontally. Spread the cut side of the French bread with the cheese spread. Bake for 10 minutes, until spread is melted.

Set the oven to broil, and broil until the cheese starts to brown, about 3 minutes. Cut into slices and serve immediately.