This is a great healthy recipe that tastes amazing and is easy to make. It's also very versatile and can be adjusted to your own tastes or what you have available. You can make it as spicy (or not) as you like by adjusting the amount of chilli powder. Serve with rice or baked sweet potato and salad.
I have also experimented with this using different ingredients with good results: adding different vegetables e.g. mushrooms, spring onions, sweetcorn. Adding sweet chilli sauce and Worcestershire sauce instead of tomato purée. You can pretty much use this as a base for whatever you have available.