Preheat oven to 400°F.
Split the French bread loaf in half lengthwise and place onto a parchment-lined baking sheet. Cut the clove of garlic in half and rub the bread with the cut side of the garlic to flavor it. Slather each flat side of each loaf with 1/2 cup of French onion dip then top half with provolone then mozzarella cheese.