Activate the Seeds: In the medium mixing bowl, combine the chia seeds and cashew milk. Whisk vigorously for about one minute to fully incorporate the seeds and prevent initial clumping.
Bloom: Let the mixture stand at room temperature for 15 minutes. You will notice it begin to thicken as the chia seeds start to form a gel.
Infuse with Flavor: Add the date paste, vanilla extract, ground cardamom, and optional salt to the bowl. Whisk again until the date paste is well-distributed and the mixture is smooth and uniform in color.
Portion the Pudding: Carefully divide the chia mixture evenly among the four individual ramekins or glass pots.
Final Chill: Secure the lids or cover the pots with plastic wrap. Transfer them to the refrigerator to set for a minimum of 4 hours, or preferably overnight.
Check for Readiness: The pudding is ready when it has thickened to a spoonable, gel-like consistency, similar to a classic pudding.
Garnish and Serve: Just before enjoying, top the pudding with your choice of fresh fruit and a sprinkle of chopped pistachios or seeds for texture.