In a medium bowl, combine 2 cups of Greek yogurt, ¼ cup of honey or maple syrup, the zest of 2 limes, ¼ cup of fresh lime juice, and ½ teaspoon of vanilla extract. Stir until smooth and creamy.

Line a baking sheet with parchment paper, ensuring it covers the bottom and sides for easy removal.

Pour the yogurt mixture onto the lined baking sheet and spread it evenly into a layer about ¼ inch thick.

Evenly sprinkle your choice of optional toppings over the yogurt layer for color and texture.

Place the baking sheet in the freezer and let it freeze for 4 to 6 hours, or until completely solid.

Remove from the freezer and let it sit at room temperature for about 5 minutes before breaking into pieces.

Serve immediately or store any leftovers in an airtight container in the freezer for up to 2 weeks.