1) Set the grill to medium low (around 175C). Mix together both meats, the egg as a binder, the Worcestershire sauce, allspice, cloves and mustard along with desired amount of salt and pepper. I prefer grinding my own allspice and cloves and it takes just a couple of each. It is important not to over work the meat so it becomes tough.
2) Divide the meat into 6 burgers about 2.5cm thick and press the centres in to prevent them from balling up on the grill. Place on the grill for approximately 5 minutes per side depending on desired doneness. The bread should go on the grill after turning the burgers, at a low temperature area so they will toast but not burn.
3) Begin warming the sauerkraut in a separate pan. Top the burgers with slices of cheese in the last 2 minutes of burger cooking time.
4) Remove the burgers and bread from the grill. Spread each slice of bread with Russian dressing and top with sauerkraut. Cover with the remaining bread. Serve with coleslaw, apple sauce and a cold beer.