01 - In a small bowl, combine Greek yogurt with vanilla extract and sweetener, if desired, stirring until smooth and fully blended.
02 - Set out four clear serving glasses or parfait cups for assembly.
03 - Distribute an even layer of diced pineapple into the base of each glass.
04 - Spoon mandarin orange segments over the pineapple, creating a distinct second layer.
05 - Spoon the prepared vanilla yogurt mixture over the fruit layers, smoothing the surface in each glass.
06 - Finish each parfait with a mint leaf and a sprinkle of shredded coconut, if using. Serve immediately or refrigerate until ready.