01 - Line a baking sheet with parchment paper.
02 - Place chopped chocolate in a heatproof bowl set over a saucepan of barely simmering water (double boiler method) and stir until melted and smooth, or melt in 20-second microwave intervals, stirring between each.
03 - Holding each strawberry by the stem, dip it into the melted chocolate, swirling to coat evenly and allowing excess chocolate to drip off.
04 - Immediately sprinkle the dipped strawberry with chopped pistachios or dip it into the pistachios for a thicker coating.
05 - Place coated strawberries on the prepared baking sheet.
06 - Let the chocolate set at room temperature for about 30 minutes or refrigerate for 10 to 15 minutes for faster setting.
07 - Serve immediately or store in an airtight container in the refrigerator for up to 24 hours.