Put the cream, milk, yogurt, and cardamom in a bowl and mix thoroughly, then strain through a sieve into another bowl.
Divide the mixture amoung four 1/3 cup (2 1/2 fl oz, 80 ml) capacity ramekins and put in a baking dish. Pour hot water into the dish to come about halfway up the sides of the ramekins.
Bake for 15-20 minutes or until firmly set, keeping an eye on them. Remove from the water bath and leave to cool to room temperature.
Serve in the ramekins at room temperature or chilled, garnished with the pistachio nuts and pomegranate seeds.