Once the chocolate is melted and smooth, remove from the heat. Line a sheet pan with parchment or waxed paper. Holding the strawberry by the stem, dip the fruit into the dark chocolate, lift and twist slightly, letting any excess chocolate fall back into the bowl. Set strawberries on the parchment paper. Repeat with the rest of the strawberries. Set the strawberries aside until the chocolate sets, about 30 minutes.