Preheat the oven to 200°F.Line a 9 x 11-inch baking sheet with parchment paper. Arrange the chocolate bars in a single layer so they fit snugly together.
Bake for 6-10 minutes, or until the chocolate is just melted but not runny.
Remove the pan from the oven and immediately sprinkle the granola, banana chips, and flaked coconut over the melted chocolate. Arrange the yogurt-covered pretzels on top, then gently tap the pan a few times to help the toppings settle into the chocolate.
Melt the chocolate chips in a double boiler over medium-low heat, stirring until smooth. Drizzle the melted chocolate over the bark.
Refrigerate until completely firm, then break into pieces and store in an airtight container in the refrigerator.
