Place chocolate chips in a bowl; set aside. In a saucepan, bring cream and orange peel to a gentle boil; immediately pour over chips. Let stand for 1 minute; whisk until smooth. Add extract. Cover and chill for 35 minutes or until mixture begins to thicken.
Beat mixture for 10-15 seconds or just until it lightens in color (do not overbeat). Spoon rounded teaspoonfuls onto waxed paper-lined baking sheets. Cover and chill for 5 minutes.
Gently shape into balls; roll half in nuts. In a microwave; melt chocolate and shortening; stir until smooth. Dip remaining balls in chocolate; allow excess to drip off. Place on waxed paper to set. Store in the refrigerator.