1.
Preheat grill to medium and lightly oil grate.
2.
In a bowl, stir all sauce ingredients together. Set aside.
3.
In a larger mixing bowl, stir all burger ingredients together. Form into 4 patties.
4.
Grill patties for about 14 minutes, until cooked through. Meanwhile, toast kaiser rolls.
5.
Serve burgers in toasted buns with sauce.