Kohl Rabi and Potato Gratin

When we visited Mandy and Jon back in May we told them we were growing Kohl Rabi. I had never eaten it before or even heard of it until Steve was given some plants from Simon next door. Jon and Mandy have a weekly organic box of vegetables and recommended Kohl Rabi and Potato Gratin. I found it took too long to cook - but then I need to be more careful now that I have a new kitchen but the end results were worth it. Unfortunately Poppy would not agree with me.