Its just the flower stalk. It is like a green onion in how you use it, but it has a fleshy gelatinous texture kind of like an aloe vera plant with great garlic taste. It softens up when you cook it. I hope that helped!

We also eat the entire garlic earlier in the year as a green garlic, just like a green onion. These are my first garlic planting here. This fall I will choose a location to plug in a bed of garlic that will remain there, i will plant the whole head as one and eat most of the shoots that come up as green garlic and then scapes... The few I leave to grow will become my seed cloves for future crop plantings.