Start by combining water, Limoncello, and granulated sugar in a medium saucepan. Heat it up over medium until the sugar melts well, then set it aside to cool. This is your soaking syrup for ladyfingers.
Next, in a big bowl, beat egg yolks with ⅔ cup sugar until pale and kind of thick. Slowly whisk in all that mascarpone cheese until smooth and dreamy.
In another bowl, beat the egg whites until they hold stiff peaks. Fresh eggs help here. Gently fold this fluff into the mascarpone mix so you keep that lightness.
In a separate bowl, whip cold heavy cream, powdered sugar, and vanilla extract until stiff and glossy. Then fold this whipped cream into the mascarpone mixture. You want everything nice and smooth.
Grab those ladyfingers and do a quick dip into the cooled Limoncello syrup for just a second. Don’t soak too long or they’ll get soggy. Layer them in your serving dish for a solid base.
Spread half the mascarpone mixture over your ladyfinger layer. Drizzle half the fresh lemon juice on top and sprinkle that zesty lemon peel over. It’s like flavor fireworks.
Repeat this layering with the rest of your ladyfingers, mascarpone mixture, a splash more lemon juice, and a final dusting of lemon zest.
Cover it up and chill in the fridge for at least 4 hours or overnight if you can wait that long.
Notes
Serve chilled and enjoy the refreshing citrus flavor. Can be stored in the fridge for up to 3 days.