01 - Line a rimmed baking sheet (approximately 9x13 inches) with parchment paper, ensuring the paper extends slightly over the edges for easy removal.
02 - In a mixing bowl, combine the Greek yogurt, honey or maple syrup, lime zest, lime juice, and vanilla extract. Stir thoroughly until the mixture is smooth and creamy with no streaks remaining.
03 - Pour the yogurt mixture onto the prepared baking sheet and spread it evenly into a rectangle approximately 1/2 inch thick, working quickly to maintain an even layer.
04 - Scatter the crushed graham crackers evenly across the surface. Sprinkle white chocolate chips and sliced almonds over the top if desired, and finish with an additional dusting of lime zest.
05 - Place the baking sheet level in the freezer and freeze for a minimum of 3 hours, or until the bark is completely set and firm to the touch.
06 - Once fully frozen, lift the bark out of the pan using the parchment paper overhang. Break or cut into serving-sized pieces.
07 - Serve immediately straight from the freezer. Store any remaining pieces in an airtight container in the freezer for up to 1 month.