I was recently at the farmer's market and came across some onion scapes. I have never cooked with them before so I did a little research on the internet and found that pesto is a common use of garlic scapes, so why not onion scapes. They taste like the green parts of a green onion. RZ does not recognize onion scapes in the recipe posting process, so I have substituted garlic scapes; either can be used.