Mix all the pudding ingredients in a bowl and leave aside.
After 30 minutes, whisk the bowl content one more time in order to break any formed lumps then cover the bowl with cling film and put it in the fridge for 12 hours.
After 12 hours, take the bowl from the fridge and mix it thoroughly. If the consistence appears to be too thick for you, you can add a tablespoon of greek yogurt, then whisk it all together.
Peel, core and chop the pineapple in small chunks.
Put the pineapple chunks and the raspberries in the serving cup/ jar/ glass/ whatever you like, the chia pudding and some more fruits on top, sit back, relax and enjoy!