Split ground beef into four and mold into burger patties, just a little wider than the base of one of the pretzel buns.
Ensure the center of each patty is thinner as the patty will rise in the middle when it cooks.
Season both sides of each patty liberally with salt and pepper.
Heat oil in skillet on high heat
Tilt the skillet as needed to spread the oil around.
Carefully place patties in the skillet and cook to desired temperature. Lower heat as needed.
Remove patties from skillet and allow to rest for 5 minutes.
Lower heat to medium and place burger bun halves cut side down in skillet and allow them to heat through and soak up the meat juices.
Remove buns from skillet and place the base of each burger bun on cooking tray.
Place a cooked patty on top of each base then top with a generous mound of fig onion jam.
Place one or two slices of cheese on top of onion jam and place under a hot broiler to melt the cheese. Make sure the broiler is nice and hot so that the cheese melts quickly.
Once cheese has melted place burger buns tops on top and serve immediately.