Peel the bananas and coat them with the peanut butter. Melt the chocolate (either by using a microwave or place it into a heatproof bowl and put it over a pan of barely simmering water). Cover the bananas with the melted chocolate and sprinkle them with the above named toppings. Let the chocolate harden for a couple of minutes, this will take about 5-10 minutes depending on how warm it is in your kitchen. On hot summer days, put them in the freezer for a few minutes. Cut them into bite-sized sushi pieces with a sharp knife. You can either eat the banana sushi right away or freeze it for an hour and two and enjoy it as easy vegan ice cream bites.