Microwave the chocolate together in 30 second intervals until melted. Set aside.
Whip the heavy cream to soft peaks, place in the refrigerator until needed.
Bring a small pot of water to a boil.
In a medium size bowl, whisk together egg yolks, sherry, salt, and honey.
Place bowl over the pot of water, careful that the water does not touch the bottom of the bowl. Using the steam as a heat source, warm the egg yolk mixture while whisking constantly for about 5 minutes. Mixture should become very frothy and thicken to “ribbon stage.” If you allow some of the egg mixture to flow off the whisk into the bowl, and a ribbon of the mixture stays visible for several seconds before disappearing, you are there.
Add the melted chocolate to the sabayon mixture. Fold with a rubber spatula until mixture is almost completely combined.
Add the whipped heavy cream in three stages. The first stage, mix well until everything is smooth. The next two stages, fold carefully and gently.
Place mixture into a piping bag and allow to set up in the refrigerator for 1 hour. This can be prepared up to two days ahead!