Cassata Gelata

The cassata of Sicily comes in two forms: the famous cake with its marzipan armor and candied fruit crown, and this frozen version, which strips away the baroque exterior to reveal what matters most. The filling. The ricotta. The careful balance of sweet and bitter, creamy and cold.

Sheep's milk ricotta is not negotiable. Cow's milk ricotta makes an acceptable filling for lasagna. For cassata gelata, it makes nothing worth eating. The sheep's milk brings a tang, a depth, a complexity that no cow can provide. Sicilian pastry makers have known this for centuries. You will know it the moment you taste the difference.

The candied fruits must be real, not the garish American things dyed red and green for fruitcake. Candied citron, orange peel, perhaps some cherries preserved properly. The pistachios must be Sicilian, from Bronte on the slopes of Etna, where volcanic soil produces nuts of such intense green and sweet flavor that no other pistachio compares. These are not optional luxuries. They are the architecture of the dish.

This is a make-ahead dessert, which is its great gift. Assemble it the day before your dinner party. Unmold it with ceremony. Slice it to reveal the mosaic within. Your guests will believe you capable of magic.