When I was growing up I had never heard of bok choy soup. But I had heard off collards, spinach, turnip greens, rape, and curly leaf mustard. Mother would cook this all the time with a big pan of crunchy cornbread. Times they are a changing! How do you fix your bok choy. I have never stirfried it but I hear that it's great that way. To all my Yankee friends stay warm and safe. We Southerners wouldn't make it in this cold blast. I guess we would freeze to death. But , I will say - we would find a