My wife has been steaming our hamburgers lately, and they are awesome! Very juicy. I don't know if that's the just pat of butter she puts in the middle of the patty, or if it's the steam. She puts them in a vegetable steamer, like so:
She also steams the cheese in little metal ramkins, and it comes out very gooey.
One downside is that the "patty" comes out in a ball. Makes it hard to put a lot of toppings on it. But who needs toppings?
One upside is that you don't have to clean up a skillet, afterwards.
Has anyone else tried this?