Start your grill with briquettes and any sticks you have laying around in the yard.
In a medium-size bowl, mix the ground beef and pepper. Form two ½-pound patties.
Remove the outside layer and cut your onion to make thick slices. Do not separate the individual layers. I like to add a thin layer of bacon grease to both sides of the onions right before putting them on the grill. Another great reason to always save your bacon grease.
When your fire is ready, go ahead and place the burgers on the grill along with your onions. Cook to your desired doneness. When the burgers are almost finished, you will toast the buns lightly on the grill. To get a light toasting, you will only leave them on for about 30 seconds. This should be enough time for them to barely start browning.
Finally, put your burger and onions on the bun, top with slices of cheese, and dig in.