Grind the 3lbs of brisket on a fine dye on a meat grinder. Form into 6.5oz patties, about 1" thick and season with kosher salt and fresh cracked pepper.
Sear in a cast iron pan on medium-high in a little canola oil for 4.5 minutes per side.
At the 3 minute mark on side two, top the patty with, first, 1 large tablespoon of bacon onion jam and, second, cheese.
Cover with a lid to let the cheese melt and the jam to warm.