Baked Mashed Potatoes

55min · 6 servings 2.5 lbs Yukon gold potatoes • 2 cups milk • 4 cloves garlic • Salt and pepper to taste • 4 tbsp butter • 2 tsp herbs de Provence • 1/2 cup sour cream • 1 cup mozzarella cheese Cover and bake for 45-50 minutes or until potatoes are fork tender