Puree mangoes until smooth. Sweeten with a touch of honey if your mangoes are not sweet. (I skipped the honey since my mangoes were already sweet)
Place the mango puree in a mason jar and keep in the fridge.
Mix together coconut milk and water. Sweeten with honey to taste and add a pinch of salt.
Mix in the chia seeds and refrigerate for a few hours or overnight.
If pudding is too gooey the following day, add more coconut milk or water.
Divide pudding among 6 glasses and top with a layer of mango purée.
Garnish with diced mangoes and serve cold.