Customers line up on a Saturday morning at Truth Barbeque in Brenham, the Posse’s first stop of the trip. (Photo ©Michael Ainsworth/Texas BBQ Posse) At the first stop of the day on a barbecue tour, we almost never order dessert. Plenty of opportunity later for sweets, if we’re still hungry. And so it was at Truth Barbeque in Brenham on a recent Saturday morning. After tasting the joint’s beef rib, brisket, pork ribs, turkey and sausage, we confirmed that Truth deserved every bit of its recent Texas Monthly ranking among the Top 10 places in the state. “I can’t think we’re…