2 large ripe bananas
1 cup crunchy salted peanut butter
1 cup salted peanuts, chop
Blend banana and peanut butter until combined and stir in chopped salted peanuts. Melt chocolate in a heatproof bowl over a small pot of hot water on a low heat making sure the bowl doesn't touch the water until melted.
Line a 16 by 12 inch cookie sheet with parchment paper. Pour melted chocolate over and spread a even layer over the cookie sheet. Drop tablespoonfuls of the peanut butter banana nut mixture over the top and swirl with a knife for marbled effect. Refrigerate until set (about 2 hours). Cut bark into 3 inch square pieces to serve.
Store in a airtight container in the refrigerator.