Not a big fan of raw onions, but that does look good. I haven't had a decent burger in forever.
How common is mixing cheese in with the ground meat, anyway?
Fun fact, American "cheese" is not allowed to be called cheese in the states. Every package says American Slices.
Didn't even know there was a special name for this. My family does something very similar but with ground beef, pork, and/or turkey and use our own spices (paprika, cumin, etc.). Not recommended for people who like their burgers rare for obvious reasons.