Sorry it took so long to answer this - young fava beans only need to be shelled. The older beans need the waxy coating removed - this can be done by blanching in boiling water for 1 minutes - plunge into an ice bath - pull off skins. Yes, they can be used in soups. The "net" is full of recipes - just get on google and type in
broad bean, soup
Quite a few!!
"Count yourself...you ain't so many" - quote from Buck's Daddy