1 1/2 lbs. ground meat
1 c. milk
1 tsp. salt
3/4 c. rolled oats
2 tsp. diced onion
1 1/4 tsp. pepper

SAUCE:

1 c. ketchup
1/2 tsp. salt
3 tsp. vinegar
1/4 c. diced onion
1 c. water
2 tsp. sugar
1/2 c. diced celery

Brown patties on both sides and place into casserole. Pour sauce over hamburgers; cover and bake at 350 degrees for 1 1/2 hours.