Wash the mushrooms well and chop them, set a side. Make the stock and meanwhile heat some oil in a pan and cook onions for about 2 mins. Add the rice and cook for another 2 mins or so
Add the wine and let it evaporate. Now add the mushrooms and about 3/4 of the stock, enough to cover the rice. Season and stir frequently for about 10-12 mins, adding more stock as necessary
Now add the chop sage and continue simmering and stirring, adding more stock if needed. Continue for remaining cooking time. Right at the end, add a knob of butter and a tablespoon of Parmesan. Stir for another min until creamy. Serve with a little more Parmesan if desired
