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In another pan, bring the vegetable stock to the boil and leave over a low heat. Pour the white wine on to the rice and cook over a moderate heat, stirring constantly, until the liquid has evaporated.
Ladle enough of the stock over the rice to just cover it. Continue to cook, stirring occasionally, until the liquid has been absorbed. Continue in this way for 20-25 minutes until rice is tender (add boiling water if you run out of stock).
Peel and dice the avocadoes and fold into the risotto with the chopped walnuts. Serve topped with vegan parmesan if desired.
posted by Mr Falafel