Preheat your gas or charcoal grill </span>: On medium-high
Make your patties: Combine all ingredients for the burger. Form 4 equal sized burgers. Don't make them too thick or they will be difficult to cook thoroughly. With your fingers, form a nice little dent in the middle. The burger will puff up in the middle during cooking and the dent will allow your burger will puff up evenly.
Cook burgers: Brush grates of grill with a little oil. Cook burgers on medium-high direct heat for 4 minutes with lid closed. Open lid, throw your whole scallions on the grill. Flip burgers and cook another 4 minutes with lid open, or until internal meat is 160F. Serve with grilled scallions, a side of kimchi and any other toppings that you'd like. I like piling the kimchi on the burger.