Activate the Seeds: In a medium mixing bowl, combine the chia seeds and unsweetened cashew milk. Whisk vigorously for about one minute. This step is crucial to fully incorporate the seeds and prevent them from clumping at the bottom.
Bloom: Let the mixture stand at room temperature for 15 minutes. You will see it begin to thicken as the chia seeds start to absorb the liquid and form a gel.
Infuse with Flavor: Add the date paste, vanilla extract, and ground cardamom to the bowl. Whisk again thoroughly until the date paste is completely dissolved and distributed, and the mixture is smooth and uniform in color.
Portion the Pudding: Carefully divide the chia mixture evenly among four individual ramekins or small glass jars.
Final Chill: Secure the lids or cover the pots tightly with plastic wrap. Transfer them to the refrigerator to set for a minimum of 4 hours, though overnight is preferred for the best texture.
Check for Readiness: The pudding is ready when it has thickened to a spoonable, gel-like consistency.
Garnish and Serve: Just before serving, top each portion with the fresh raspberries and a sprinkle of chopped unsalted pistachios to add brightness and crunch.