Joanne's Ultimate Tiramisu

Instructions

In a bowl, combine the espresso, 2 tablespoons of the sugar and 2 tablespoons of the rum.

Ribbon 4 egg yolks and 1/2 cup sugar until very light.  Add the mascarpone and mix until smooth.  Add the remaining 1/4 cup rum, lemon juice, and vanilla.  Whip the cream until it forms soft peaks and flavor with the confectioners' sugar.  Beat the 4 egg whites until stiff and add the cream and egg whites to the mascarpone mixture.

To assemble: Dip half the ladyfingers one at a time in the coffee mixture and line the bottom of a 13" X 9" baking dish.  Spread half the cream mixture over the ladyfingers.  Repeat with the remaining ladyfingers and cream mixture.  Cover with a thick layer of the combined grated chocolate.  Set in the refrigerator for 2 hours.