Preheat your Yoder Smokers YS640 pellet grill to 400ºF, set up for indirect grilling.
In a large bowl, toss the all veggies with House of Q Slow Smoke Gold Mustard Sauce to coat. Spread the veggies in an even layer on a parchment paper lined baking sheet pan. Season with Code 3 Spices Grunt Rub.
Roast the veggies on the sheet pan until tender, about 1 hour. Drizzle with a little oil and the juice of the lemon. Taste and season with salt, as necessary.