Beat together egg, buttermilk, salt and pepper in a shallow bowl; set aside. In another shallow bowl, mix together garlic powder and one cup flour. Dip meat into flour mixture, coating both sides evenly; dip into egg mixture and back into flour. In a large cast iron skillet, heat 1/2 inch shortening until very hot. Add meat; cook until golden on both sides and cooked through, turning once. Remove to a paper towel-lined plate; keep warm. Drain skillet, reserving 1/2 cup drippings. Blend remaining flour into drippings over medium heat. Gradually add milk to desired consistency, stirring constantly, until thickened. Heat through; add additional salt and pepper to taste. Serve gravy over meat. Serves 4.