Creating this delicious Lemon Tiramisu is simple and rewarding. Follow these steps:

1. Brew and Cool Espresso: Begin by brewing a strong cup of espresso. Allow it to cool to room temperature, then mix in the lemon juice and zest. Set aside.

2. Prepare Egg Mixture: In a mixing bowl, whisk the egg yolks and granulated sugar together until pale and creamy. This should take about 3-5 minutes.

3. Add Mascarpone: Gently fold in the mascarpone cheese into the egg mixture until well combined and smooth.

4. Whip Cream: In another bowl, beat the heavy cream until soft peaks form. Carefully fold the whipped cream into the mascarpone mixture until fully integrated.

5. Assemble the Tiramisu: Quickly dip each ladyfinger into the lemon-espresso mixture, ensuring they are soaked but not soggy. Layer a third of the soaked ladyfingers in a serving dish.

6. First Layer: Spread half of the mascarpone mixture over the ladyfingers, smoothing it out evenly.

7. Repeat Layers: Add another layer of soaked ladyfingers, followed by the remaining mascarpone mixture. Finish with a final layer of ladyfingers, if desired.

8. Chill: Cover the dish with plastic wrap and refrigerate for at least 4 hours, though overnight is preferred for optimal flavor.

9. Serve: Before serving, dust the top with powdered sugar and garnish with fresh mint leaves if desired.

These straightforward steps will guide you in creating this incredible Lemon Tiramisu effortlessly, resulting in a dessert that is sure to impress!