3 1/2 (1 ounce) squares bittersweet chocolate, chopped
1/2 cup margarine
1 cup superfine sugar
3 egg yolks
3 egg whites
8 matzo sheets
1 (750 milliliter) bottle concord grape wine
1/4 cup finely chopped nuts
Melt chocolate in a small bowl in the microwave by heating at 30 second intervals, and stirring between each one. When chocolate is almost melted, just remove from the microwave and stir until smooth. Set aside.
In a large bowl, cream together the margarine and sugar until light and fluffy. Beat in the egg yolks one at a time until well blended. In a separate bowl, whip egg whites with a pinch of superfine sugar until stiff. Fold the melted chocolate into the sugar mixture, then fold in the egg whites.
Pour 1/4 of the bottle of wine into an 8×8 inch baking dish. Soak one of the matzo sheets briefly on both sides, then remove to a serving platter. If you soak too long, it will break apart and become hard to work with. Spread a thin layer of the chocolate cream over the soaked matzo. Continue soaking and layering the matzos and chocolate cream, leaving enough of the chocolate mixture to frost the sides when finished. Add more wine to the dish as necessary for soaking.
Press chopped nuts onto the sides, or sprinkle them on top for garnish. Refrigerate overnight to allow the chocolate and wine to blend flavors.