@msolga,
Same as parsley, etc., as far as I know.
I used chervil in rolled biscuits.. and other things, but I don't remember what right now, will look it up.
Sunset Western Garden book says to use it like parsley, fresh or dried.
Says that it goes to seed quickly in hot weather, to keep flower clusters cut to encourage leafy growth, and mentions partial shade. (Anthriscus cerefolium)