After all that recipe searching, and asking for help here.. I bought Costco premade burgers. Stupid dislocated finger was not going to co-operate with even holding a bowl, never mind mixing stuff. I picked their most expensive option, 100% beef, 80% lean.
No idea how they tasted, but holy cow they fell apart easily. Couldn't put them on the grill directly, they just fell through. So, partly cooked on tinfoil, then on the grill for the last bit. Threw some cherry wood chips on the grill, dunno if it made any difference. The corn didn't taste any different from usual.
And those burgers were the size of hockey pucks! They shrunk down a bit, but still.. WAY too big for the buns.
And now they want a turkey for Christmas.. please, no..
Thanks for all the help!