sarah : Pardon for late reply, just managed to put my boy to bed. Mine is quite similar to Carol's method.
But i use corn, i boil 1/2 corn in water,remove the core, left the grains, steam the fish, and blend the fish with the corn, together with a bit of the water used for boiling the corn, and 1 tablespoon of milk powder, boil the pasta till soft, and pour the fish & corn sauce onto the pasta, mix well & serve.