This is a nice summer-friendly, no-bake variation of the traditional black forest cake. I used dark chocolate mousse as the filling and dark sweet cherries. Use the finest chocolate for best flavor. Both homemade or store bought tart crusts do not require baking, so it is a superb dessert for hot summer days. If you keep the tart in the freezer and eat it frozen, the texture of the chocolate mousse becomes almost like ice cream.
Special note about silky and smooth chocolate mousse: the temperatures of the three different mixtures--egg, melted chocolate and whipped cream--have to be very close, if not the same. If the chocolate or egg mixture is too warm, the whipped cream will deflate, resulting with a dense mousse. If the cream is too cold, the chocolate will seize into flecks, making the mousse grainy.