For the brisket: Preheat a smoker for smoking at 275 degrees F. (Don't beat yourself up trying to maintain the exact temperature. Stay within 25 degrees of your target, and you should be good.)
Mix together the salt and pepper in a bowl, then rub it all over the brisket. Smoke brisket until it reaches 165 degrees F, about 8 hours. Wrap with foil and continue to smoke until internal temperature reaches 203 degrees F and the thermometer slides in and out of the brisket like it was butter, about 2 hours more.
Let rest for at least 1 hour.
Chop the brisket.
For the queso: Set up a double boiler. Add the cheese, diced tomatoes and chiles and milk to the upper pan of the double boiler. Cook over medium-high heat, stirring continuously, until cheese is fully melted.
For the veggies: Mix the onions and peppers in a bowl. Toss with oil, pepper, salt and granulated garlic. Cook veggies in a saute pan, stirring continuously, over medium-high heat until veggies are translucent.
For the sandwiches: Toast buns. Add BBQ sauce to each half. Add nice handfuls of the chopped brisket to bottom buns. Add a little more of the BBQ sauce on top of the meat. Add queso, veggies and jalapenos to your desired heat. Add corn chips for a crunchy treat, if desired. Top with top buns.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.