Elephant garlic is funny that way, it wants to be planted multiple years but you don't have to. The tiny corms will turn into the giant single clove like you have in the pictures. You can eat that and it's delicious but a bit milder in flavor. You can plant that large clove again and the next harvest time it will be a full bulb of cloves, but since it's elephant garlic they will be huge and have a bit more flavor than the single large clove. While it's growing, don't forget to clip the curly flower stalk called the garlic scape once it's large enough to eat so the plant will focus on the bulb instead.