Place a piece of parchment paper on a baking sheet that will fit in the freezer.
Peel the mandarin and separate into individual slices.
Place a big scoop of vanilla Greek yogurt in a small bowl.
Dip each slice of the mandarin into the Greek yogurt, covering about half of the mandarin slice.
Place the individual mandarin slices on parchment paper.
Freeze for at least one hour for a snack, overnight if adding to lunchboxes.