It's probably the easiest and fastest burger I've ever cooked.
Form the beef into a ball and season with salt and pepper. Smash the ground beef into a hot skillet and press thinly sliced white onion directly on top. Cook until the sides of the burger are browned and flip with onions to cook the other side. It only takes a few minutes.
Add cheese and buns on top to heat and steam. A few minutes later remove everything from the skillet and assemble. Enoy!
I'm glad I couldn't help!
If you think about it homemade burgers are definitely healthier than fast food.