Melt the butter in a pan and add the diced onions fry for a few minutes and then add garlic and then the mushrooms. Cook until the mushrooms are softened.
Add in the dry orzo and stir well.
Next add in the miso paste and vegan chicken stock and stir until there are no miso lumps.
Cover with a lid and put on a simmer until the orzo has absorbed the stock and is cooked through.
Stir the cream and parmesan into the orzo and serve up in bowls.