Get the grill pan really hot. An oil grill is where the burgers go. Place a ball of meat (1/3 pound or 1/6 pound for thinner burgers/see note) on the hot grill and mash it lightly with a sharp spoon.
Top with a small handful of onions, sliced very thinly, mash the burger to the very end, and pour the onions with the meat.
Season the top with salt and pepper and cook. Don’t mess with that.
When the bottom is dark brown and the burger is about done, scrape it under the burger to get the “crust” and flip it.
Continue cooking for another 1-2 minutes. Cover with cheese and melt for another 1-2 minutes. * While the cheese is melting, you can place and slice the donuts on the grill to toast.
Place the burger on the bottom of the bun, top it any way you like it, place it on the top bun, and dig it in!
Enjoy!
