At the farmers' market this summer, I was introduced to the world of garlic scapes by my favorite organic farmer (tall, skinny man in overalls with a long grey beard and straw hat...classic).
Scapes are the green chutes of the garlic that grow out of the ground, and are quite delicious. He taught me to make a pesto with them. I put the bunch of scapes, olive oil, S&P, and parmigiano in the food processor (adding olive oil / cheese to balance out the consistency to a nice pesto) and chop minimally, so it remains somewhat chunky. The scapes have a nice mild flavor and it was great as a cold pesto salad. Here it is-