Stir-fry the diced chicken in the oil.
Add the Butter Chicken paste and the water and simmer gently with the lid on.

Tips
Replace the diced chicken with a different types of meat. Try adding some finely chopped spring onion and diced tomatoes.
In place of water, you can add coconut milk, yoghurt or cream, or a combination of both for a milder taste.
Garnish the dish with fresh coriander.