Over a medium heat, spray a large frying pan with low calorie cooking spray and cook the onions for around 5 minutes until softened.
Add the peppers, carrots, mushrooms, turmeric, and curry powder and cook for another couple of minutes.
Mix up the stock cube with the boiling water.
Add the rice to the pan and give it another few sprays of low calorie cooking spray so that the rice doesn't stick together. Stir well.
Serve immediately on its own, or with your choice of meal!