Brisket Flat, 3 different methods, all fairly the same. Substitute whole brisket if you prefer/have the room. I've heard people call it "Atlanta style" when using a Coke & ketchup based sauce. 1.) Preheat oven to 325. Slice up a couple medium white or yellow onions. Rub down a brisket flat with your favorite seasoning. Sear the brisket in a skillet on both sides; maybe 2 minutes for each side. Remove the brisket from the skillet and set aside. Saute the onion slices until brown; about 10 minutes. Line a 9x13 dish with onions in a nice, even layer. Put the brisket on the onions. Pour 16 oz./2 cups of your favorite barbecue sauce over the brisket. Cover with a foil and cook in the oven until done. Maybe 3 hours. Remove baking dish from the oven. Remove aluminum foil from baking dish. Wait at least 30 minutes before carving. 2.) Line the bottom of a crock pot with 2 medium sliced onions. Rub down a brisket flat with your favorite seasoning. Place the brisket on top of the onions. Pour 16 oz./2 cups of your favorite barbecue sauce over the brisket. Cook on low until done. Probably 6 hours. Wait at least 30 minutes before carving. 3.) Fuel up the smoker and get a fire going. Rub down a brisket flat with your favorite seasoning. Stick the brisket in the smoker and cook until the internal temperature hits about 165F. Remove brisket from the smoker. Line a disposable aluminum baking dish with, you guessed it, 2 sliced onions. Brisket on top of the onions, sauce on top of the brisket, cover it with aluminum foil, and back on the smoker until done. At least 3 hours total. Remove baking dish from then smoker. Remove aluminum foil from baking dish. Wait at least 30 minutes before carving.