Step 1

Preheat the oven to 350°F.

Step 2

Cut the bread in half, horizontally. Mix the butter, garlic, red pepper flakes, mozzarella,  ½ cup of the parmesan, salt and pepper together in a small bowl. Spread butter mixture over the two bread halves. Place on a sturdy baking pan and heat in the oven for 10 minutes.

Step 3

Remove the pan from the oven. Sprinkle more Parmesan cheese over bread and return to the 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.

Step 4

Remove from the oven, let cool for a minute, slice and serve.