2 cups mashed potato (might be 1 day old) 1 large egg
1/2 cup all-purpose white flour 1/2 teaspoon garlic powder 1/4 teaspoon mustard powder 2 ounces soft cheese, such as Talegio, Brie, Muenster, or other 3 to 4 tablespoons vegetable oil for frying, or as needed