Gai lan sounds right up my alley. I love broccoli and veggies like. It'll plant some for sure this summer.
I'd better not mess with epazote. Anything that self-seeds agressively is not for me. I've got cosmos and sweet pea out the wazoo, forever trying to pull them up because of forays with them years ago.
And I LOVE arugula, we plant it every year, but it does have a very definite strong taste, unlike nothing else, that's for sure.