Preheat the oven to 425 degrees.
Mix together olive oil, parmesan, garlic, salt and pepper in a bowl.
Brush the mix over the tops of the green beans
Bake for 15 minutes and then remove from the oven and add the mozzarella cheese to the top.
Bake for another 3-5 minutes or until the mozzarella is melted, bubbly and golden.
Top with parsley, additional salt and pepper as desired and serve!