Preheat oven to 375 degrees. Using a serrated knife, cut the bread in a crosshatch pattern being careful not to slice through the bread to the bottom crust.
In a small saucepan or microwave, melt the butter. Stir in minced garlic, parsley, and grated parmesan cheese. Brush the butter inside of the bread pulling it gently apart and distributing it evenly.
Tuck the pieces of cheese in each section of the bread filling the entire loaf. Place the bread on aluminum foil and wrap it up entirely. Bake the bread for 15 minutes. Unfold the foil and bake for an additional 10-15 to crisp the top. Serve immediately.