Chocolate Mousse Cake

1 tablespoon ground almonds, plus additional to dust pan10 1/2 ounces dark chocolate (70 percent cocoa)1 1/2 cups sugar1 1/4 sticks (10 tablespoons) unsalted butterPinch of salt5 large eggsConfectioners' sugar, optionalHeat oven to 350 degrees. Lightly spray an 8- or 9-inch springform pan with cooking spray, then dust it with ground almonds, shaking off any excess. Set aside.In a double boiler set at a low simmer, melt the chocolate, butter and sugar, stirring frequently. Remove from the heat.In a medium bowl, beat the eggs and ground almonds. Fold the egg mixture into the chocolate and stir until thickened, several minutes. Pour the batter into the pan, smooth the top and bake 45 minutes, or until the top is set and begins to crack.Remove the side of the pan and let the cake cool completely. Dust with confectioners' sugar, if desired.Serves 10.Green & Black's chocolate