Line your pan: Lay parchment paper on a rimmed baking sheet or inside a 9x13-inch pan so the bark lifts out easily later.
Mix the base: In a bowl, stir together the Greek yogurt, honey or maple syrup, vanilla, and a tiny pinch of salt. Taste and adjust sweetness.
It should be pleasantly sweet but not sugary.
Spread it out: Pour the yogurt mixture onto the lined pan. Use a spatula to spread it into an even layer, about 1/4 inch thick. Thinner sets faster and is easier to bite into.
Add the fruit: Scatter your chopped fruit evenly over the yogurt.
Press the pieces lightly so they stick. Keep chunks small so the bark breaks cleanly.
Optional toppings: Sprinkle mini chocolate chips, coconut, or a few finely chopped nuts. A little goes a long way.
Freeze: Transfer the pan to the freezer and freeze until completely solid, about 2–3 hours.
For thicker bark, give it an extra hour.
Break into pieces: Lift the bark out using the parchment. Break into roughly 12–16 pieces. Aim for portions around 100 calories by watching topping amounts and size.
Store properly: Keep the pieces in a freezer-safe bag or container with parchment between layers to prevent sticking.