Line a baking sheet with waxed paper and set aside. Microwave morsels in an uncovered microwave-safe bowl 1 minute on medium-high (70%) power; stir until smooth. If a few unmelted pieces of chocolate remain in the bowl, don’t attempt to heat it further; it can burn easily.
Pour chocolate onto the prepared baking sheet and spread it about ⅛ inch thick, into a 7x9-inch rectangle. While the chocolate is still wet, sprinkle on the apricots and press them down lightly. Sprinkle on the pistachios; set aside 15 minutes to dry. When set, break into large odd-shaped pieces and transfer to an airtight container, separating pieces with wax paper.