1 Brisket. Size does not matter. Trimmed or not.
Salt
Pepper
Penzey's English Prime Rib Rub
Montreal Steak Seasoning
2 medium white onions
3 cloves of garlic
1 16 oz bottle of Coke
Season the brisket with the spices. Slice the onions into rings. Crudely crush the garlic. Spread about 3/4 of the onions and the garlic in the bottom of an appropriate sized roasting pan. Put the brisket in the pan fat side up and put the rest of the onions on top of it. Pour the Coke over the brisket. Re-season if need and and make sure onions are still on top of the meat.
Cover with foil and cook @ 400 for 30 minutes and then turn down to 250 for 6 hours for an 8-10 pounder. Baste every two hours. Meat thermometer.
Remove from pan, cover with foil and let rest for 25 minutes. Slice and eat.