First, make a thick chia pudding. You'll want to make this ahead of time, at least 2 hours or the night before. In a half-pint (8oz) mason jar, stir together the milk chia seeds, vanilla, and maple syrup. Set mason jar in the fridge to set for at least 2 hours.
After chia pudding is set, blend together the strawberry smoothie layer. Add bananas, strawberries, and milk into a blender, and blend on high until smooth.
To assemble the parfaits, fill two half-pint (8oz) mason jars with a quarter of the chia pudding each, then half of the strawberry puree each, then the last quarters of the chia pudding.
Garnish with sliced strawberries and granola, if desired.