Boil the kettle and soak the dried shiitakes for at least 5 minutes.
Finely chop the onion and wipe the mushrooms with some kitchen paper before slicing them up.
Drain and slice the shiitakes (reserve some of the soaking juices to intensify the mushroom flavours).
In a pan, heat a little olive oil and sweat the onion for about a minute on a low-medium heat.
Add the mushrooms and rice and cook for another minute, stirring well to coat the rice with a little oil.
Add a ladle of stock and let it absorb, frequently stirring. When nearly fully absorbed, add another ladle and repeat the process until the rice is done – about 20-25 minutes.
Stir in the grated parmesan right at the end.
Serve with a generous sprinkling of parsley.