Rub roast with Wenches Gold Cayman Steak & Rib Rub.
When ready to cook, start the Traeger according to grill isntructions. Set the temperature to the Smoke setting (set to Super Smoke if using a WiFIRE-enabled grill) and preheat, lid closed, for 10-15 minutes.
Smoke the chuck roast either directly on the grill or on a rack in the Dutch oven for 1-1/2 hours. Remove roast from grill and increase temperature to 275 degrees F.
In a Dutch Oven or Foil Pan combine potatoes, carrots, onions, ancho chili powder, chipotle chili pepper, jalapeño pepper, minced garlic, salt, pepper, celery, and mushrooms, sherry, and beef stock mixing thoroughly. Place Rosemary and Thyme bunches on top of vegetable mix.
Transfer the smoked chuck roast to the Dutch oven or foil pan placing roast on top of herb bunches.
Place the lid of the Dutch oven and place into the Traeger. At 275 degrees F, braise the roast for 4-5 hours or until meat it very tender.
Serve with your favorite roasted vegetables or mashed potatoes and gravy. Enjoy!