Simple Chicken Curry

1 onion, chopped
2 tbsp oil
4 tbsp curry paste
4 chicken breasts, diced
20og chopped tomatoes
100ml water
200ml double cream

Heat the oil in a frying pan, cook the onions over a low heat for 10 minutes until softened. Add the curry paste, cook for a 3 minutes. Add the chicken and cook until sealed. Add tomatoes and water, cook for about 15 minutes. Turn off the heat and allow to cool for a few minutes, stir in the cream. Serve with rice.