You are lucky to find them at a market. You might also check the frozen vegetable section, probably next to the edamame. I grow them myself so that I can have them. I use the fresh ones as I would fresh peas or shell beans. I shell them before using them. A very short blanch is enough to cook them. I freeze the fresh, shelled, raw chickpeas and use them as frozen peas. They are okay raw, but unless you catch them at just the right time, rather starchy. After the peak of the season, I let them mature on the plants and then shell the dried beans for use as dried chickpeas.
Searching on "fresh chickpeas" in the EYB recipe search turns up about 20 recipes containing the ingredient to look at for ideas. You can also search on a variety of terms such as "green garbanzo" or "fresh garbanzo" to get recipes that mention them in the recipe title.
Let us know what you do with them.