Prepare a baking sheet with parchment.
In a bowl, combine the yogurt, peanut butter and maple syrup.
Spread evenly onto the parchment paper in a rectangle shape, and add the sliced banana and chopped peanuts. Drizzle the chocolate and peanut butter over top.
Freeze for four hours until hardened. Slice the bark into your desired size (I did 8 pieces), and store in a reusable container or ziplock bag in the freezer for up to four months.
