Here are 3 of the Posse’s favorite holiday side dish recipes, left to right, collard greens, twice-baked potato casserole & kale salad. (Photo ©Chris Wilkins/Texas BBQ Posse) Like a good song, no barbecue feast is complete without strong accompaniment. So, just in time for Thanksgiving and Christmas, here are a few of the Posse’s favorite side dishes. Sherry’s favorite twice-baked potato casserole This recipe cooks up easily for a crowd and can be prepped early, refrigerated and then baked at the last minute. Sherry Jacobson’s twice-baked potato casserole recipe. (Photo ©Chris Wilkins/Texas BBQ Posse) Ingredients 5 pounds baking potatoes 1…