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Red onion

Red onion

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Red onions, sometimes called purple onions, are cultivar
A cultivar'Cultivar has two meanings as explained under Formal definition. When used in reference to a taxon, the word does not apply to an individual plant but to all those plants sharing the unique characteristics that define the cultivar. is a plant or group of plants selected for desirable...

s of the onion
The onion , also known as the bulb onion, common onion and garden onion, is the most widely cultivated species of the genus Allium. The genus Allium also contains a number of other species variously referred to as onions and cultivated for food, such as the Japanese bunching onion The onion...

 with purplish red skin and white flesh tinged with red.

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.

Red onions are available throughout the year. The red color comes from anthocyanidin
Anthocyanidins are common plant pigments. They are the sugar-free counterparts of anthocyanins based on the flavylium ion or 2-phenylchromenylium, which is a type of oxonium ion . They form a large group of polymethine dye. In particular anthocyanidins are salt derivatives of the...

s such as cyanidin
Cyanidin is a natural organic compound. It is a particular type of anthocyanidin . It is a pigment found in many red berries including but not limited to grapes, bilberry, blackberry, blueberry, cherry, cranberry, elderberry, hawthorn, loganberry, acai berry and raspberry...

. Red onions are high in flavonoids.

They can be stored 3 to 4 months at room temperature.

Red onion of Turda

The red onion from Turda
Turda is a city and Municipality in Cluj County, Romania, situated on the Arieş River.- Ancient times :The city was founded by Dacians under the name Patavissa or Potaissa...

 (Cluj County
Cluj County
Cluj ; is a county of Romania, in Transylvania, with the capital city at Cluj-Napoca.-Demographics:In 2007, it had a population of 692,316 and a population density of 104/km².*Romanians – 80%*Hungarians – 17.5%*Roma – 2.5%-Geography:...

, Central Romania
Romania is a country located at the crossroads of Central and Southeastern Europe, on the Lower Danube, within and outside the Carpathian arch, bordering on the Black Sea...

) (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
Arieș River (Mureș)
The Arieș is a tributary of Mureș River in Transylvania, Romania.Most probably "Arieș" means "Gold River" in Dalmatian which is thought to be very similar to the Dacian language. It is concluded that the Romanian name most probably derives from the Dacian name of the river...

 valley and the middle Mureş
Mures River
The Mureș is an approximately 761 km long river in Eastern Europe. It originates in the Hășmașu Mare Range in the Eastern Carpathian Mountains, Romania, and joins the Tisza river at Szeged in southeastern Hungary....

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 onion of Tropea

The red onion from Tropea
Tropea is a municipality located within the province of Vibo Valentia, in Calabria .The town is a famous bathing place, situated on a reef, in the gulf of St...

, Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

, (Italian: "Cipolla Rossa di Tropea") is a particular variety of red onion which grows in a small area of Calabria
Calabria , in antiquity known as Bruttium, is a region in southern Italy, south of Naples, located at the "toe" of the Italian Peninsula. The capital city of Calabria is Catanzaro....

 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
Marmalade is a fruit preserve made from the juice and peel of citrus fruits, boiled with sugar and water. The benchmark citrus fruit for marmalade production in Britain is the "Seville orange" from Spain, Citrus aurantium var...

 with it. In March 2008, the European Union registered the Protected Designation of Origin
Protected designation of origin
Protected Geographical Status is a legal framework defined in European Union law to protect the names of regional foods. Protected Designation of Origin , Protected Geographical Indication and Traditional Speciality Guaranteed are distinct regimes of geographical indications within the framework...

mark for the onions produced in this particular area.

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