Heat the oil in a small frying pan. Place the chopped onion in the frying pan and cook until the onion becomes soft and brown. Place the chicken, mushrooms, cauliflower and soya sauce into the frying pan and cook for 10 minutes, stirring occasionally. Add curry powder, while stirring, until the oil is soaked up by the powder.
Place the cup of chicken stock into the pan and simmer till the liquid is reduced, stirring continuously.
Serve with brown rice or fried sliced potatoes.