1/3 cup ketchup
2 TBSP brown sugar
1 TBSP prepared yellow mustard
Mix oatmeal, meat, egg, milk, onion, salt and pepper together. Press into loaf pan.
Mix the topping in a separate bowl. Pour the topping over the meatloaf.
Bake in a pre-heated 350 degree oven for 1 hour and 20 minutes.
When the meatloaf is cooked, drain off any grease. Allow to stand for 5 minutes, then slice and serve.