Bake the pastry thirds according to box directions.
Cool completely and slice each one in half horizontally.
Beat eggs and sugar 3 mins.
Heat 1 c. heavy cream in saucepan until hot and slowly pour it into egg mixture while mixer running on low.
Add this mixture back to the saucepan and stir over med-low for 7 minutes to thicken.
Remove heat and stir in chocolate.
Cover and chill 2 hours.
After 2 hours, whip the 1 1/2 c. cream to stiff peaks.
Fold it into the mousse.