Chunky Monkey "Ice Cream" Bonbons

Adapted from Nom Nom Paleo [1]

Into a food processor, blend frozen banana slices, vanilla, and salt until smooth and creamy.
Put mixture into a container with a lid. Fold in chocolate chunks, cover, and freeze for at least 2 hours or until the banana ice cream is set.
Line a baking sheet with parchment or wax paper. Use a melon baller or small cookie scoop [2] to scoop out balls of frozen banana ice cream and place on the baking sheet. Cover tray, and place in freezer. Freeze overnight or until the scoops are set.
In a microwave-safe bowl, melt candy melts according to directions on the bag. Remove banana balls from the freezer, and using a skewer inserted into the ball or a chocolate dipping fork [3], dip in melted chocolate. Place chocolate-dipped bonbon back on the parchment-paper-lined baking sheet. While chocolate is still wet, sprinkle chopped walnuts on top. Store in freezer before serving.