Lemon Potion: In a small saucepan, whisk together the lemon juice and granulated sugar. Heat it up over medium, stirring until the sugar disappears. Take it off the heat and stir in that glorious lemon zest. Let it cool down – patience, grasshopper.
Creamy Cloud: In a chilled bowl, whip that heavy cream with your electric mixer until stiff peaks form. Set it aside like the precious commodity it is.
Mascarpone Moment: In another bowl, beat the softened mascarpone and powdered sugar until it's smooth and dreamy.
The Big Fold: Gently fold the whipped cream into the mascarpone mixture. Be gentle, we're not trying to deflate a soufflé here.
Ladyfinger Lagoon: Dunk each ladyfinger into the cooled lemon syrup for a hot second on each side. Don't drown them, just give them a little soak.
Layer Up: Arrange a layer of these lemony fingers in your baking dish.
Cream Dream: Spread half of that luscious mascarpone mixture over the ladyfingers.
Repeat Offender: Add another layer of soaked ladyfingers.
Final Flourish: Top with the remaining mascarpone cream, spreading it evenly.
Chill Out: Cover that beauty with plastic wrap and let it chill in the fridge for at least 4 hours, but overnight is where the magic truly happens.
Garnish & Devour: Right before serving, sprinkle those white chocolate shavings on top like confetti. Slice and prepare for a flavor explosion that'll make you say "ooh la la!"