Okay, I am going to TOTALLY avoid name dropping on this one.
Several years ago the members at Belle Fourche CC in South Dakota let a young woman have their kitchen and she whipped up some of the best burgers I EVER tasted.
The secret, as always, was using about 30% fat burger, and not overworking the patties. Throw those bad boys on that old, well-seasoned flat top, and magic happens. Crusty brown on the outside, and juicy on the inside.
Of course, the greasy fried onions didn't hurt any, either.
BTW -- I have to recreate the burger i saw on Man vs Food last night. It had a split Krispy Kreme as bun. They split them and put them on the grill to brown, then assembled the bacon cheeseburger with the browned side of the doughnut on the outside, so the hot patty melted the glaze on the Krispy Kreme.
K