Place the chopped chocolate in a small heat proof bowl. Heat the whipping cream in a small saucepan over medium heat until it just begins to simmer, or microwave on high for 60 seconds. Pour over the chocolate and let sit for 5 minutes.
Stir until smooth, microwaving for 10 second intervals if needed to melt any remaining lumps.
Fill a saucepan with one inch of water. Place over medium heat and bring to a boil. In a large heat proof bowl, combine the egg yolks, sugar, wine, and salt. Whisk together and immediately place the pot of simmering water. Continue to whisk constantly for several minutes until the mixture is light and foamy and hot to the touch.
Fold in the chocolate gradually and stir until smooth and fully combined. Serve warm or chill for several hours and serve cold.