Separate eggs, placing whites in large bowl, yolks in small bowl.
Beat in yolks, one at a time, beating well after each. Let cool, stirring occasionally, 15 minutes, or until slightly thickened. Stir in 4 tablespoons creme de menthe. With electric mixer at high speed, beat egg whites until stiff, moist peaks form. With same beaters, in small bowl, beat cream until stiff. Fold the egg whites and half of whipped cream into the chocolate mixture. Cover; refrigerate mousse and remaining cream u
To serve: With electric mixer at high speed, beat the reserved whipped cream with the remaining cream de menthe. Spoon into pastry beg fitted with 1/2-inch star tip. Pipe 6 swirls on mousse. Between each swirl, press a chocolate wedge slightly into mousse to stand upright. Garnish with fresh mint, if desired.
Makes 10 servings.