Place red onion slices on bottom of large baking dish. Place brisket on top of onion. Pour over 1 to 2 cups cold coffee. Sprinkle brisket with onion soup mix, garlic powder, paprika, pepper and cumin. Add red wine until brisket is almost covered. Cover dish with foil and bake at 325 degrees for 2 to 3 hours or until tender.
Cool and refrigerate. When preparing to serve, skim off fat and slice when cold. Place slices back into juice. Cover and reheat at 350 degrees 15 to 20 minutes. Makes 8 to 10 servings.
NOTE: This recipe is good for parties because it can be made one day ahead. It tastes better the second day.
