Step 1 of 3

Peel and devein most of the prawns (a fishmonger should be able to do this for you), keeping a few whole for decoration, if you like. Heat the olive oil in a large frying pan or shallow flameproof casserole over a medium-low heat and fry the onion for 5 mins until softened. Add the bay leaf, saffron, rice and tomato purée, and cook for 1-2 mins more, stirring.