While there are several items sold at Friar Tuck's, to me, the only item that should be ordered at Tuck's is a drink and the famous Turkey Leg.
The Turkey Leg is one of two treats in the park (see my review on First Cone for the other) that is a must to any visitor. The turkey leg itself is plenty large enough for two or three to share, so do not feel like you have to order one for each person in your party. You'll pick through the leg, and typically just in time for your next ride