LINE a baking sheet with waxed paper.
MICROWAVE morsels and vegetable shortening in a medium, uncovered, microwave-safe bowl on HIGH (100%) power for 1 minute; stir. Morsels may retain some of their original shape. If necessary, microwave at additional 10- to 15-second intervals, stirring until smooth. Dip cake pieces into chocolate mixture; shake off excess. Place on prepared baking sheet; drizzle tops with additional chocolate. Refrigerate until set. On skewers, alternately thread chocolate coated pieces of cake with pieces of fruit; refrigerate. Serve with Strawberry Sauce.
FOR STRAWBERRY SAUCE:
PUREE strawberries and sugar in blender until smooth.