Worst Thanksgiving buffet. Prime rib was supposed to be on the menu. that was the main reason my family made dinner reservations at the Walnut Grill in O"Fallon, MO. They ran out and said it was still cooking. They were totally unprepared. I went through the buffet line 3 times in an attempt to get prime rib and each time there was none. The turkey that was served was processed pre-formed slices, not fresh turkey. It looked and tasted like high end sandwich meat. The soup was room temperature and was labeled lobster bisque. Had they not labeled it as such I would never have guessed what it was supposed to be. My family and I spent a lot of money for a disappointing, unsatisfying Thanksgiving dinner.