1 pkg. onion soup mix
1/4 c. water
1 c. ketchup
2 tbsp. prepared mustard
2 tbsp. grape or black raspberry jam
4-5 lbs. corned beef brisket, not spiced

Combine all ingredients except brisket. Blend well. Place half of the mixture on the bottom of a roasting pan. Add brisket and top with the remaining mixture. Cover and cook at 325 degrees for 3 1/2 hours. Chill thoroughly in refrigerator. Slice thin to serve.