Scapes are the garlic flowers, although they are generally harvested and eaten before flowering. When growing garlic it is important to remove the scapes in order to direct as much energy into bulb formation as possible. The scapes generally have a mild garlicy flavor, and can be used in all sorts of dishes, although pastas generally predominate. They are ionly available a few weeks each year, so enjoy them while they are here.
BTW Garlic is an easy crop to grow. Although generally frowned on, I use garlic cloves that have accidentally sprouted in the fridge and plant them. Supermarket garlic is treated with sprouting inhibitors, and are therefore hit-or miss if planted "properly" in the fall before sprouting, but the ones that sprout in the cold fridge seem to do ok.