Angel Food Dessert

1 (12 oz.) pkg. chocolate bits
2 tbsp. sugar
3 eggs, separated
1 pt. Cool Whip
1 baked angel food cake

Melt the chocolate bits and sugar in a double boiler. Add 3 beaten egg yolks and let cool 10 minutes. Blend Cool Whip with 3 beaten egg whites; then fold into the chocolate mixture. Break up one store bought angel food cake and layer cake pieces and chocolate mixture until pan is full ending with chocolate on top. Top with chopped nuts. Cool until serving time.