If pumpkin is maybe the winner in the Winter recipes' presence, Treviso chicory (radicchio di treviso) is probably the second! I love it, and, just like pumpkin, it's open to multiple use: raw, stewed, grilled, baked, it's also a perfect and tasty ingredient for soups, sauces... and for flans like the one I'm presenting today. Here it goes:
For 4 persons: