Smashing Burger

Heat a cast-iron heavy skillet over medium-high until very hot, about 2 minutes, then lightly brush with vegetable oil.
Season ground beef all over with a generous dash of salt and ground pepper, gently folding into the ground beef prior to forming into balls. Divide ground beef into 4 loosely formed balls (this is the key to a great smash burger).
Add round balls to skillet and using a firm, stiff metal spatula, press down on each one to flatten. Cook without moving until a golden brown crust develops, about 4 minutes. Use the edge of the spatula to carefully scrape up and flip the patties one at a time, making sure to get all browned bits removed from the skillet.
Top each patty with a slice of cheddar cheese. Continue to cook until digital rapid-read thermometer inserted sideways into centre of each patty reads 160°F (71°C). Top each cooked patty with your favourite burger condiments.