Two-Mushroom Rice

This is a simple vegetarian adaptation of a traditional chicken-rice-mushroom dish my mother often made when I was a child. It remains a favourite of mine. One must properly appreciate the mushroom which, in the words of a discriminating scholar, ‘belongs to that category of plants used in cooking whose main function is to add less flavour than the spices and herbs, less bulk than the real vegetables, and to absorb differentially the flavours of the dish, in order to bring out, by subtle ch