Heat the oil in a saucepan. Add the onion and fry (sauté) gently for 3
minutes. Add the rice and cook, stirring, for a
further 1 minute.
Add 600 ml/2 1/2 cups of the
stock and bring to the boil. Simmer gently for 15 minutes or until the liquid is absorbed.
Stir in the remaining
ingredients except the cheese, including the rest of
the stock, and simmer for a further 10 minutes or
until the liquid is absorbed and the rice and
vegetables are tender.