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Boil the kettle. Heat the oil in a shallow pan with a lid, add the onion, peppers, chorizo, garlic and chilli, then fry over a high heat for 3 mins. Add the turmeric and rice, stirring to ensure the rice is coated. Pour in 500ml boiling water, cover, then cook for 12 mins.
Uncover, then stir – the rice should be almost tender. Stir in the prawns and peas, with a splash more water if the rice is looking dry, then cook for 1 min more until the prawns are just pink and the rice tender. Stir in the lemon zest and juice with seasoning and serve with extra lemon wedges on the side.