Mix onion, relish, Worcestershire sauce, and any of the optional ingredients you wish to use, together. Be sure to get the eggs mixed in completely. Roll meat out and make 16 thin patties. Spoon the pre-made mixture upon the top of one patty. Place another patty on top. Press firmly to join them. Wipe up the mixture that runs out of the patty stack and spread over the top of the patty stack. Either broil in your oven until they are as you prefer them or on a barbecue grill as you see fit.
