I was about to try five cloves, glad I checked here first!Note: I tried to make some more and failed! It either became burnt inside or was too soft and not toasted. Maybe it was because I was trying to cook too many cloves at once.
This is a warning to anyone who tries this - do it one clove at a time and ensure the clove is completely dried out before grating. Back to try again tomorrow. I got too upset to persist today...