How to cook
Step 1: Heat oil in a large frying pan and saute onion until translucent. Add chicken and cook until browned. Add rice and stir until all the grains are coated with oil.
Step 2: Pour in chicken stock, add mushrooms and fold through. Season with pepper then cover. Simmer gently until all the liquid has been absorbed, about 20 minutes.
Step 3: Fold parmesan through rice mixture, serve immediately.