Prep your pan: Line a rimmed baking sheet with parchment paper. Use a smaller sheet (about 9x13 inches) for thicker bark or a larger one for thinner bark.
Mix the base: In a bowl, stir together Greek yogurt, honey or maple syrup, vanilla, and a pinch of sea salt.
Taste and adjust sweetness.
Spread it out: Pour the yogurt mixture onto the lined baking sheet and spread into an even layer about 1/4 inch thick.
Add the raspberries: Scatter raspberries evenly across the surface. Press them in gently so they adhere as the bark freezes.
Sprinkle extras: Add coconut, nuts or seeds, lemon zest, and chocolate if using. Keep toppings light so the bark holds together.
Freeze: Place the sheet in the freezer for 2–3 hours, or until completely firm.
Break into pieces: Lift the parchment out and break the bark into shards.
Aim for bite-size pieces for easier snacking.
Serve or store: Enjoy immediately, or return to the freezer in a sealed container for later.