Editor's note: The recipe and introductory text below are excerpted from chef Neil Perry's book Rockpool. Neil also shared some helpful cooking tips exclusively with Epicurious, which we've added at the bottom of the page. For your convenience, we've converted the measures with as much accuracy as possible from Australian to American. For those who have metric equipment and wish to follow Neil's recipe to the milliliter, we've included the original measures too. To read more about Neil and Australian cuisine, click here. In this dish, the combination of pastry, fish, sauce, yoghurt and spinach makes a complete dish. The cardamom and tomato are a perfect match, and the fish steams gently inside as the outside of the pastry crisps up. This dish also works beautifully with the flat fish of Europe and America. It is important that the vegetables are well-seasoned and cooked until they caramelise to impart their flavour to the sauce. The depth of flavour of aromatics is so often lost when they are not allowed to do their job properly. The Tomato and Cardamom Sauce goes nicely with all seafood; its deep, rich flavour enlivens the taste buds. The tomatoes are cut up, skin, seeds and all. Slice into thin rounds, then into julienne and chop the julienne to give a uniform dice. Don't chop them as if cutting for concassé, they lose too much juice that way.