I had a head of radicchio (also called red chicory) from my farm box (which I don't really love - it's usually rather bitter), and didn't know what to do with it. I decided to barbecue it, thinking that the bitterness might turn to nuttiness, and I was right! I barbecued slices of halloumi alongside, and chopped and tossed it all with some Greek dressing. Was it ever good!
You can use shop bought Greek dressing, but if you can find them, don't omit the fresh oregano leaves!