Recently, I've taken to feeding the local guinea pig my veggie leftovers. They eat carrot tops, cauliflower greens and Kohlrabi leaves. This has gotten me to rethink the "waste" of vegetables - they are indeed someone elses treasure.
I discovered that Kohlrabi greens can be people-food too, but I am stumped by the green parts of leeks. They are quite large but they don't agree with guinea pigs. Is there any use for the greens of leeks, other than throwing them in the stockpot?