Preheat the oven to 375°F. Lightly grease a metal 9" round cake pan; cut a piece of parchment to fit, grease it, and lay it in the bottom of the pan.
In a bowl, add the dried cherries and cover with red wine. Set aside.
To make the cake: Put the chocolate and butter in a heat-safe bowl. Add 2 inches of water to a sauce pan and bring to a simmer. Fit the bowl over the sauce pan so that it fits snugly but does not touch the water. Stir occasionally until the chocolate and butter have melted.
Stir in the sugar, salt, and vanilla. Then, add the eggs, whisking briefly until smooth. Fold in the cocoa powder.
Drain the cherries. Add the drained cherries to the batter and mix to combine. You can keep the liquid and make a cocktail out of it!
Spoon the batter into the prepared pan, spreading the batter evenly. Bake the cake for 25 minutes; the top will have formed a thin crust, and it should register at least 200°F on an instant-read thermometer inserted into its center.
Remove it from the oven, and cool it in the pan for 5 minutes.
If using a springform pan, release the sides and move the cake to a serving plate. If using a regular cake pan, loosen the edges of the pan with a table knife or nylon spreader, and turn it out onto a serving plate. The top will now be on the bottom; that's fine. Also, the edges will crumble a bit, which is also fine. Allow the cake to cool then sprinkle some powdered sugar on top to serve.