Roughly chop the chocolate.
Gently warm the cream on the hob while stirring. Once it starts bubbling around the edges remove it from the heat immediately.
Add the chocolate to the cream mixture and gently stir. As you stir, the chocolate should begin to melt. Keep stirring until all of the chocolate has melted and it is fully mixed with the cream.
Stir in the chopped cherries.
Spoon the mixture evenly over your 6 bases and put into the fridge for a couple of hours to set.
When you are ready to serve, turn out the tarts if you are using the moulds. Then top with the whole cherries and any other berries you like. I also sifted a tiny amount of cocoa powder over the tart, just to be fancy.