The Romano bean (Italian flat bean), often sold as "snap beans" are a fast-growing and high-yielding crop.
As far as I can remember into my childhood, my parents have been planting and using these beans. We've pickled them, made them into pasta dishes, made them into both warm and cold salads, stewed them, and much more.
Their culinary versatility and yield through the fall had made them a staple of our backyard garden forever. They grow in a climbing fashion and generally once the plant has grown past 6 inches, we begin providing support through a trellis structure (a fancy way of saying, just put some some old bamboo canes in the soil next to them).