This orange and lemon tart combines the bright citrus flavor of lemon and orange in a crisp gingersnap crust. You can make the orange and lemon tart up to 1 month ahead, so it’s perfect for a party. Just omit the whipped cream and garnish, and chill as directed. Remove the metal rim of the tart pan; cover with plastic wrap, and freeze in a zip-top plastic freezer bag. Thaw overnight in the refrigerator, and add the whipped cream and garnish up to 4 hours before serving.