Rabbi David Shawel at the first Dallas Kosher BBQ Championship. (Photo ©David Duchin) Along with the food and the fun, one of the more intriguing aspects of the Dallas Kosher BBQ Championship, which makes its third annual run Sunday, Oct. 29, is how the smokers, grills, knives and other cooking utensils are kept from year to year to ensure they remain kosher. “It’s pretty neat,” said Rabbi David Shawel, the top Kosher cop at the event. “We’re dealing with a very high standard.” Kosher dietary laws, derived from the Hebrew bible, involve the food itself and the way it is…