Ruth Chris Steakhouse Copycat Recipes: Garlic Mashed Potatoes  --- GARLIC MASHED POTATOES Ruth Chris Steak House Copycat Recipe  Serves 6-8  7 cups peeled and cubed baking potatoes 6 cloves garlic, peeled 1/2 cup low-fat milk 1/4 cup Parmesan cheese, grated 2 tablespoons butter 1/2 teaspoon salt 1/8 teaspoon pepper