Cut the bread in half, horizontally. Mix the butter, garlic, and basil together in a small bowl. Spread butter mixture over the the two bread halves. Place on a sturdy baking pan and heat in the oven for 10 minutes. Remove pan from oven. Sprinkle Parmesan cheese over bread if you want. Return to oven on the highest rack. Broil on high heat for 2-3 minutes until the edges of the bread begin to toast and the cheese bubbles. Watch very carefully while broiling.