Mustard seed is also one of those things, like coffee or chocolate, that makes me wonder about the people who first thought to make something edible from it. Accounts vary widely but I think mustard seed was probably used to flavor something like mostarda and then came to dominate the condiment.
The last of the quince got a bit dry so I used it in a batch of mostarda. I used Amy Sherman's recipe and replaced the apple with quince.
