Cute, quick, and single-serve meatloaf muffins are a hit for parties and potlucks. Plus they bake up in half the time. Drop scoops of the turkey mixture into a standard muffin tin using a large ice cream scoop. Brush on ketchup topping. Bake in the preheated oven at 325 degrees until golden brown and 165 degrees when a food thermometer is inserted in the center, about 45 minutes.