No, we don't mean that Tesori (the new Italian spot in the old Rhapsody spot) has suddenly become an all-chickpea restaurant or something. This is actually a pretty cool idea for a party or business dinner theme. If you have a group of 10 or more people, you can book the private dining room at Tesori, and chef Andrew Deuel will make you a dinner built around a current seasonal ingredient— every course will, in some way, feature the use of that ingredient. The opening one is the highly versatile and seasonal blood orange, and it will turn up in dishes ranging from blood range rosemary marmalade to go with berkshire pork tenderloin, to blood orange butter sauce with olives on pan seared striped sea bass, to a frozen mascarpone blood orange parfait. So, you get a group dinner that's creative and out of the ordinary, and... you don't have to deal with everyone trying to figure out what to order for themselves. Blood orange will be the One Ingredient beginning February 15 and running through the end of March; it's $65 per person for the five-course meal, with $20 for wine pairings, and reservations must be made in advance at 312-786-9911.