Caucasian Spinach / Mountain Spinach (Hablitzia tamnoides). Can be eaten raw or cooked (like spinach!). Young shoots and flowers can also be eaten. Your plants will be young but well-rooted, read to be potted up or planted out.
The "2 X Caucasian Spinach plant" would be perfect for health-conscious gardeners looking to grow organic vegetables with a beneficial omega-3 and protein-rich leafy green.