Lathrus ochrus is one of my favorite regional edible nitrogen-fixing covercrop species in Greece. I've not yet encountered it cultivated in North America.
Lathyrus ochrus leaf and flower
Also known as Cyprus Vetch, or Psara locally, the plant establishes throughout mild winters, as winter temps warm up before spring the tender edible tips start fattening up and plants put on massive amounts of vegetative growth.
Locally the leaves are eaten raw in salads with a bit of lemon, olive oil and a pinch of salt.
It is also reported on PFAF that the seeds are edible cooked noting that caution is advised. Where I have lived in Greece there is no report of the seed being edible, although the leaves are widely consumed during early spring.