Preheat oven to 250 degrees F. Place nuts in an single layer on a shallow baking pan and roast in oven for 10 minutes, stirring occasionally. Remove nuts from oven to cool.
Meanwhile, melt the chocolate in a heat-proof bowl over a saucepan of simmering water (not letting the bowl touch the water) or in the microwave in 15 second bursts, stirring often, until just melted.
Pour the nuts into the chocolate and stir to combine. Using a tablespoon, scoop spoonfuls of the chocolate-nut mixture onto a silicone baking mat.
Allow to cool and harden completely before removing from the mat to serve. Store nuts in an airtight container at room temperature in a cool, dark place for up to 1 week.