For the burgers: Preheat the grill to high heat. Mix together the beef, onions
, breadcrumbs, mayonnaise, salt, garlic, celery salt, soy sauce and eggs in a large bowl until thoroughly combined. Form the meat into 5-ounce patties, and then cover and set aside in the refrigerator while preparing the toppings.
Let the burgers come to room temperature before cooking, and then grill
until medium-rare. Meanwhile, heat a nonstick pan and cook eggs
to over-easy, for topping burgers.
For assembling: Top the burgers with American cheese, bacon, spam, Portuguese sausage, over-easy eggs and lettuce
. Serve with the Muffler Magic Sauce on toasted buns.