1 large egg yolk
1/4 cup prepared mustard
salt & pepper to taste
1 cup diced yellow onion
1 lb. ground pork
4 hamburger buns
4 lettuce leaves
4 slices tomato
4 tsp. mayonnaise (optional)

1) Blend egg yolk, mustard, salt and pepper together until fluffy.
2) Add diced onions and ground pork. Blend well.
3) Divide mixture into quarters and shape into 4 Burgerloo patties.
4) Cook patties on grill over medium heat, about 15 minutes for medium-well.
5) Place cooked patties on hamburger buns adding lettuce, tomato and (optionally) 1 teaspoon mayonnaise or serve platter style open-faced.

4 servings.