Ali cuts Easter brisket at La Barbecue “Cuisine Texicana” in Austin. (Photo ©Chris Wilkins/Texas BBQ Posse) Over a three-day period recently, Posse co-founder Chris Wilkins and I each ate at La Barbecue “Cuisine Texicana” the trailer start-up in Austin featuring pitmaster John Lewis — and free beer. Comparing notes later, we agreed that La Barbecue would have fared well in our recent Best of Texas Tour. We didn’t include it because the joint opened last November and has been operating only a few months. Longevity is a consideration. On this trip, we went to Austin for the wedding of Posse members…