Julia Altshuler wrote:
> The other day I managed to put a little in a wonderful cream of
> mushroom soup. (I used shiitake mushrooms from the Asian market. They
> were very flavorful.) He didn't notice and pronounced it
> wonderful.

You could try using mushroom ketchup. It isn't unlike soy sauce and I
suppose he wouldn't recognise the bottle

http://www.bakersandlarners.co.uk/wa...hup-p-463.html