Preheat the oven to 350°F.
In a small bowl, mix together the softened butter, minced garlic, chopped parsley, salt, and pepper until well combined.
Spread the garlic butter evenly over the sliced bread.
Sprinkle the shredded mozzarella cheese and grated Parmesan cheese over the garlic butter
Place the bread on a baking sheet and bake in the preheated oven for 10-15 minutes, or until the cheese is melted and the bread is golden brown.
Remove from the oven and let the bread cool for a few minutes before slicing and serving.
Garnish with additional chopped parsley, if desired, and serve warm.