1, Fire up your Z GRILLS and set that temperature to 250°F.. Im using cherry pellets.
2, Once your temperature is reached, add in your Chuck Roast middle shlf(grate)
3, At that 3-hour mark, check it for even cooking and give it a spritz. You should be around 140-150 internal. Let it run for another 1-2 Hours until you hit the stall. In my case, it was 2 hours.
4, Once that stall is reached, remove it along with the tin.
5, to the tin add 1/2 to 1 onion(sliced), 2 TBS Worcestershire sauce, 2 TBS prepared horseradish sauce, 1 teaspoon Better Than Bouillon beef base, and 1/8th cup water.Add one rack and your beef chuck on the rack and seal tightly with foil...
6, Once you reach approximately 204°F internal, it is time to remove. Just double check you are tooth pick tender-