1 1/2 lb. ground beef
1/4 c. chopped onion
1/2 c. tomato sauce
1 egg
1 1/2 tsp. salt
1/4 tsp. pepper
1 c. oatmeal

Combine all ingredients for meatloaf. Mix thoroughly. Shape into loaf in the center of a 9x13 cake pan.

SAUCE:

1/2 c. tomato sauce
1 c. water
2 tbsp. vinegar
2 tbsp. brown sugar

Combine sauce ingredients. Pour over loaf. Bake at 350 degrees for 1 hour, basting with sauce every 15 minutes.