Drizzle some oil from the curry paste jar into a wok or large frying pan then gently heat, next add the onion.

Sizzle over a low heat for 4 mins until the onion softens, then stir in the paste and cook for a few mins longer.

Stir in the prawns and tomatoes, then bring to a simmer. If using raw prawns, simmer until they have changed colour and are cooked through. Season, if you like, then add the coriander just before serving with boiled rice and naan bread.