||This article needs additional citations for verification. (December 2011)|
These onions tend to be medium to large in size and have a mild to sweet flavor. They are often consumed raw, grilled or lightly cooked with other foods, or added as color to salads. They tend to lose their redness when cooked.
They can be stored 3 to 4 months at room temperature.
Red onion of Turda 
The red onion from Turda (Cluj County, Central Romania) (Romanian: "Ceapa de Turda") is a local variety of red onion with light sweeter taste and particular aroma. The area of cultivation encompass the lower Arieş valley and the middle Mureş valley. Turda onion bulbs are traditionally intertwined into long strings (1–2 m) for marketing purposes and can be found at the traditional markets all over central Romania. "Turda Red Onion" is usually served fresh, as a salad or part of mixed salads and especially as a compulsory garnish for the traditional bean-and-smoked ham soups. Red onions are sometimes used as treatments for colds, diarrhea, intestinal parasites, gallstones, and rheumatism.
Red onion of Tropea 
The red onion from Tropea, Italy, (Italian: "Cipolla Rossa di Tropea") is a particular variety of red onion which grows in a small area of Calabria in southern Italy named "Capo Vaticano" near the city of Tropea. This onion has a stronger and sweeter aroma and the inner part is juicier and whiter than other red onions and it is possible to make a marmalade with it. In March 2008, the European Union registered the Protected Designation of Origin mark for the onions produced in this particular area.
Red onions (Santa Rosa, Nueva Ecija)
Wethersfield red onion 
- Flavonoid and Carbohydrate Contents in Tropea Red Onions: Effects of Homelike Peeling and Storage - Journal of Agricultural and Food Chemistry (ACS Publications)
- eHow » Food & Drink » Cooking & Baking » Cooking Basics » Selecting an Onion. By Manish Paul. Retrieved on 11 September 2009.
- Flavour of the Med - 6 August 2004 - CatererSearch
- "A Great Trade Vanished. How Connecticut's Onion Monopoly Was Lost", New York Times, 2 June 1889
- "Wethersfield, CT, and Onions", Yankee Magazine, August 1993
|Wikimedia Commons has media related to: Red onions|