4 squares semisweet chocolate
1 tablespoon Grand Marnier
1 tablespoon water
1/4 cup butter
1 orange, rind cut into matchsticks
2 tablespoons fine sugar
2 tablespoons water
3/4 cup sponge cake
1/4 cup Grand Marnier
8 squares semisweet chocolate
6 eggs, separated, whites beaten stiffly
3/4 cup butter, cut into 1-inch dice