Instructions: For Crust:
Preheat oven to 350 F. Spray vegetable oil spray on 9-inch-diameter tart pan with removable bottom. Combine ground cookies and butter in processor; blend until very moist crumbs form. Using plastic wrap as aid, press crumbs firmly onto sides, then bottom of prepared pan.

Chill 15 minutes. Bake until set, about 8 minutes. Cool.

For Filling:
Mix currants and bourbon in heavy small saucepan. Bring to simmer over low heat. Cover and set aside. Whisk corn syrup and egg yolks in medium bowl. Bring half and half to simmer in another heavy small saucepan. Gradually whisk half and half into yolk mixture. Return mixture to same saucepan and stir over medium-low heat until custard thicken and leaves path on back of spoon when finger is drawn across, about 4 minutes (do not boil). Pour into large bowl. Add chopped bittersweet chocolate and nutmeg, whisk until melted and smooth. Mix in currants and bourbon. Chill just until cool, stirring occasionally, about 15 minutes.

Whip cream in medium bowl to stiff peaks. Fold cream into chocolate mixture. Transfer filling to crust. Chill until firm, at least 4 hours or overnight.

Gently press up tart pan bottom to loosen tart. Remove pan sides.

Transfer tart to platter. Top with chocolate curls. Sift powdered sugar over. Serve with Orange Custard Sauce.

For Orange Custard Sauce:
Bring half and half to simmer in heavy medium saucepan. Whisk sugar and yolks in small bowl. Gradually whisk in hot half and half. Return mixture to saucepan and stir over medium-low heat until custard thickens and leaves path on back of spoon when finger is drawn across, about 3 minutes (do not boil). Strain into bowl. Mix in peel.

Cover and refrigerate until cold. (Can be prepared 2 days ahead. Keep refrigerated.)

Makes about 1 1/2 cups.

Serves 12.

If you would like to email yourself the recipe for later use, or share the recipe with your friends or family, enter the email addresses below and this recipe will be emailed to you and others as well.