In a small saucepan over medium heat, melt butter and mix with garlic powder and parsley.
Place the Italian bread on a baking tray. Using a basting brush, brush generously with the butter mixture.
Bake in the preheated oven approximately 10 minutes, until lightly toasted. Remove from heat. Sprinkle with mozzarella and any remaining butter mixture. Return to oven approximately 5 minutes, or until cheese has melted and bread is lightly browned.