Heavily season the brisket with powders and pepper.
Place the brisket on a rack inside a large roasting pan. Add water to the bottom of the pan to prevent burning and to make for easier cleaning. Broil the brisket for approximately 10 minutes on each side.
Meanwhile, dissolve onion soup in 4 cups boiling water.
Add apricot jam and ketchup and stir until ingredients are blended.
After broiling the brisket, place the brisket in a deep, narrow oven-safe pan. Pour the apricot mixture over the brisket, so that the brisket is covered.
Bake for 2-3 hours at 350 degrees or until tender.
Cool. Slice. Put back into sauce and allow the flavors to blend overnight. Reheat in oven when ready to serve.