In a medium-sized bowl, whisk together the coconut milk, chia seeds, honey or maple syrup, vanilla extract, and a pinch of salt until well combined.
Allow the mixture to sit for about 5-10 minutes, then whisk again to break up any clumps of chia seeds that may have formed.
Cover the bowl with plastic wrap or a lid and refrigerate for at least 4 hours or overnight, allowing the chia seeds to swell and the mixture to thicken.
Once set, take the chia pudding out of the refrigerator and give it a stir to ensure a smooth consistency.
Layer the pudding into serving glasses or bowls. Start with a layer of chia pudding, followed by a layer of pureed mango, and repeat until glasses are full.
Top with fresh mango slices and a sprinkle of shredded coconut for garnish before serving.
Notes
Adjust sweetness to taste with honey or maple syrup.