Prepare your wood for smoking by properly soaking it ahead of time.
Cut your brisket into 1? cubes. Season with Montreal steak spice blend and place in your refrigerator for up to 30 minutes.
Meanwhile, place your meat grinder and attachments in the freezer for at least 20 minutes.
Set up your grinder for a coarse grind and grind the brisket. Run through the grinder twice if desired. Shape ground brisket into 6 patties.
Preheat your smoker to 225 degrees F and place soaked wood inside as per instructions for your smoker. Lay patties on a grate and smoke for about 45 minutes, or until the internal temperature reaches 130 degrees F.
Meanwhile, preheat a charcoal or gas grill over medium heat. Sear the burgers over direct heat 3 to 5 minutes a side to finish cooking to 150 degrees F. Move to the side, place cheese over each patty, close the lid and let the cheese melt for a minute or two.
Server the burgers on hamburger rolls with lettuce, onions and toppings of your choice.