01 - Toss peach slices with lemon juice and sugar in a bowl. Set aside for 10 minutes to macerate and release natural juices.
02 - In a large mixing bowl, whip cold heavy cream until soft peaks form using a hand mixer or stand mixer.
03 - Combine mascarpone cheese, sugar, and vanilla extract in a separate bowl. Mix until completely smooth and creamy.
04 - Gently fold whipped cream into mascarpone mixture until fully incorporated and smooth. Avoid overmixing to maintain light texture.
05 - Combine peach juice and peach schnapps (if using) in a shallow dish for dipping ladyfingers.
06 - Quickly dip each ladyfinger into peach juice mixture, ensuring moistening without becoming soggy. Work efficiently to prevent oversaturation.
07 - Arrange half of soaked ladyfingers in single layer at bottom of 9x7 inch serving dish. Spread half of mascarpone cream evenly over ladyfingers, then top with half of sliced peaches.
08 - Repeat layering with remaining soaked ladyfingers, mascarpone cream, and peach slices. Finish with peaches on top.
09 - Cover dish tightly with plastic wrap and refrigerate for minimum 4 hours or overnight to allow flavors to meld and texture to set properly.
10 - Remove from refrigerator and garnish with fresh mint leaves just before serving. Slice and serve chilled.