Dietary needs can be accomodated with 72 hours notice. You would call 407-WDW-Dine (the reservation center where you booked the res) and have the special requests noted on the reservation. If you want to call the resturant directly you can call the Contemporary hotel front desk directly at 407-824-1000 (which is not actually the front desk but rather a phones room but they can connect you if you wish to talk directly to the chef).