Ingredients
Vegetable oil for greasing pan
5 ounces wheatmeal biscuits such as Carr's whole-wheat crackers, finely ground (1 1/3 cups)
2 tablespoons sugar
5 tablespoons unsalted butter, melted
2 large egg yolks
1 1/3 cups heavy cream
10 1/2 ounces fine-quality bittersweet chocolate (not unsweetened), finely chopped
1/2 cup candied clementine peel (not sugarcoated; recipe follows), finely chopped
Special equipment: a 9- or 10-inch fluted round tart pan (1 inch deep) with a removable bottom; an instant-read thermometer