Welsh onions got nothing to do with Wales, but a lot with Asia. Its Asia where this onion commes from, and it is still widely used there. Welsh onions can be regarded as a sort of giant Chives. They form no bulbs. Its their stalks (and sometimes even their flowers) that are used for cooking. If you want to cook true asian style substitute the onions by Welsh onions. They can be harvested throughout the year. It is one of the plants that are shared among friends and neighbours and that are hardly ever to be found in nurseries. The recent enthusiasm for herbs and spices brought them back to the market and nowadays they are available from nurseries.