01 - Line a baking sheet with parchment paper or a silicone mat to prevent sticking.
02 - Place the chopped dark chocolate in a heatproof bowl and melt over a saucepan of simmering water (double boiler method), stirring until smooth. Alternatively, microwave in 30-second bursts, stirring in between, until melted.
03 - Add the roasted cashews to the melted chocolate and mix until all nuts are evenly coated.
04 - Using a spoon or small cookie scoop, drop clusters of the chocolate-cashew mixture (about 1 tablespoon each) onto the prepared baking sheet, spacing them apart.
05 - Sprinkle each cluster with a pinch of flaky sea salt, if desired.
06 - Refrigerate for 30 minutes or until the chocolate is fully set.
07 - Store in an airtight container at room temperature for up to 1 week, or refrigerate for longer freshness.