Line a baking sheet with parchment paper, ensuring you have at least a 1-inch border around all edges. This prevents messy overflow and makes removal easier after freezing.
In a medium bowl, combine the Greek yogurt, honey (or maple syrup), and vanilla extract. Whisk until completely smooth, ensuring no sweetener pockets remain.
Pour the yogurt mixture onto the prepared baking sheet and use a spatula to spread it evenly to about ¼-inch thickness.
Scatter your berries, chopped pistachios, chia seeds, and coconut evenly across the yogurt surface. Gently press larger pieces into the yogurt to ensure they adhere when frozen.
Place the baking sheet in the freezer, ensuring it sits flat. Freeze for 3-4 hours or until completely solid.
Once fully frozen, break into pieces and serve immediately or store in an airtight container.