Prepare the yogurt. In a bowl, stir 2–3 cups of yogurt until smooth. If using plain yogurt, add 1–2 teaspoons honey or maple syrup, a few drops of vanilla, and a tiny pinch of salt. Taste and adjust.
You want it lightly sweet and creamy.
Open the mangosteen. Using a small paring knife, score the thick purple rind around the middle—just deep enough to cut the skin, not the fruit. Twist gently to open. Lift out the white segments with a spoon.
Remove any large seeds if present.
Slice or leave whole. If the segments are large, slice them into bite-sized pieces. Keep small segments whole for a prettier look in the glass.
Add lime. Toss the mangosteen with a few drops of lime juice and a little lime zest. This brightens the flavor without overpowering it.
Layer the parfait. In glasses or jars, add a spoonful of yogurt, followed by a layer of mangosteen, a sprinkle of granola, and a few coconut flakes.
Repeat the layers until you reach the top.
Finish with texture. Add a final spoon of yogurt, a generous sprinkle of granola, a pinch of chia or hemp seeds, and more coconut. Drizzle with honey if you like extra sweetness.
Garnish. Add a few small mangosteen pieces, a bit of lime zest, and a mint leaf on top. Serve immediately for the best crunch.