Mine don't like the broad bean plants now that they are a bit past it... same for pea plants (but mine by now always have quite a bit of mildew, so are not fed anyway). They should be fine with the fresh runner beans, but I don't grow any so don't know if they like them.
Beetroot leaves in moderation, they have (I think) high levels of salicylic acid, but a few won't hurt.
I am currently feeding all the nasturtium leaves that have self-seeded everywhere (read = invaded) my polytunnel from a couple planted last year to cheer up the flowerless polytunnel...
I am just off the make a start on throwing out the stuff in the polytunnel - need space for hay storage!