Quick chicken curry

Name: Quick chicken curry
Ingredients: 1 tbsp oil; 500g (18oz) chicken breast or thigh cut into 3cm pieces; 1 onion, diced; 2 garlic cloves, crushed; 1 green chili, seeds removed and chopped finely; 2 tsp finely grated ginger; 2-3 tbsp mild chili paste (I used Tandoori and the recipe used Tikka Marsala); 400g (14oz) can diced tomatoes; 400g (14oz) can lcoconut milk; 2 tbsp macadamia (or cashew) butter; coriander to serve; 2 carrots, peeled and sliced in 2cm chunks; 100g (3.5oz) baby spinach leaves; rice to serve