Line an 8x8-inch baking dish with parchment paper.
In a bowl, mix the vegan yogurt, maple syrup, vanilla extract, and freeze-dried strawberry powder until well combined.
Spread the mixture evenly into the prepared dish.
Top with sliced strawberries, blueberries, mango, and optional nuts.
Place in the freezer for at least 4 hours or until firm.
Once frozen, cut into bars and enjoy!