Preheat your Traeger grill to 225*.
Unwrap the corned beef brisket from the packaging.
Rinse the meat under a stream of cool water to remove excess brine.
Discard the packaging and the seasoning packet.
Pat the brisket dry with a paper towel and place it on a cutting board.
Season all sides of the brisket flat with a generous coating of Garlic Junkie seasoning.
Pat the seasoning into the meat to adhere it to the brisket. You want a really thick coating.
Allow the seasoning to sit on the meat for about 10 minutes.
Place the seasoned brisket in the center of the preheated grill and close the lid.
Cook the brisket in the grill at 225* for about 5 hours, until the internal temperature reaches 165*.
Remove the meat from the grill and place it in the center of a large sheet of aluminum foil.
Add ¼ cup of beef broth to the foil wrapper and close tightly.
Return the wrapped meat to the Traeger and bump up the grill heat to 300*.
Continue cooking the brisket in the grill until the internal temperature reaches about 200*-- about 3 more hours.
Once the meat hits 200*, pull it from the grill and open the aluminum foil to let some of the steam and heat escape the packaging.
After 15-20 minutes vented, re-wrap the meat tightly and place it in the fridge overnight.
When ready to serve, remove the quick pastrami from the foil packaging and slice thinly on a deli slicer for best results.