01 - Line a baking sheet, approximately 23 x 33 cm, with parchment paper.
02 - In a medium bowl, thoroughly mix the Greek yogurt, honey or maple syrup, and vanilla extract until smooth.
03 - Evenly spread the yogurt mixture over the prepared baking sheet to a thickness of about 0.5 cm.
04 - Distribute the blueberries, raspberries, and sliced strawberries evenly over the yogurt. Sprinkle with chopped nuts, shredded coconut, and lemon zest if desired.
05 - Gently press the toppings into the yogurt using clean hands or a spatula so they adhere.
06 - Place the baking sheet in the freezer, uncovered, and freeze for at least 2 hours or until completely solid.
07 - Once solid, remove from the freezer and break the frozen yogurt into shards or bark pieces.
08 - Serve immediately, or transfer pieces to a freezer-safe container and store for up to 1 month.