Question: what is the proper temperature to cook meatloaf?
Answer: Transfer the mixture to a 5x9 inch loaf pan. Bake uncovered in the preheated oven 40 minutes. Increase oven temperature to 400 degrees F (200 degrees C), and continue baking 15 minutes, to an internal temperature of 160 degrees F (70 degrees C). In a small bowl, mix the remaining tomato sauce and ketchup.