Why would a Houston-based grocery store chain have good sushi? For that matter, why would 7-Eleven announce it has entered the bait business or expect to compete in freshness? We don't know the answers, but check out Tom Thumb's selection. For about five bucks, you can acquire a sweet little package of the sticky rice and seaweed concoctions. In summer months, with an abundance of caution, we stick to the California veggie offerings, because we're never quite sure about any fish that has traveled any distance in the Dallas heat in allegedly refrigerated trucks.