In a small bowl, mash the banana. Add all ingredients (besides the chocolate) to a food processor and pulse until the mixture forms into a dough. Roll the mixture into balls and place on a lined baking sheet. Place the baking sheet in the freezer for 30 minutes. Remove balls from the fridge and drizzle or dip them into melted chocolate. Place balls back in the fridge and let the chocolate harden. Enjoy right away or store leftovers in the freezer for up to 3 months.