This is a lovely way of using up bits of vegetables that you have in the fridge. Keralans do lovely stews quite similar to this (they have a stronger note of black pepper) with chicken and vegetables or even just vegetables. The curry is transformed here with a little chicken stock, lemon juice and lots of vegetables into a light, flavourful stew that is also typical of Kerala. I used vegetables that I found in my fridge but you can also use cauliflower, broccoli, green beans, spinach, peppers, edamame and really whatever you like. I serve with some simple boiled rice or some crusty bread.