Onions pickled in vinegar are eaten as a snack. These are often served as a side serving in fish and chip shops throughout the United Kingdom and Australia, often served with cheese in the United Kingdom, and are referred to simply as "pickled onions" in Eastern Europe.
Onion types and products
Common onions are normally available in three colors: yellow, red, and white. Yellow onions are full-flavored and are a reliable standby for cooking almost anything. Yellow onions turn a rich, dark brown when cooked and give French onion soup its tangy sweet flavor. The red onion is a good choice for fresh uses or in grilling and char-broiling. White onions are the traditional onion used in classic Mexican cuisine. They have a golden color and sweet flavor when sautéed.
While the large mature onion bulb is the onion most often eaten, onions can be eaten at immature stages. Young plants may be harvested before bulbing occurs and used whole as scallions. When an onion is harvested after bulbing has begun but the onion is not yet mature, the plants are sometimes referred to as summer onions.
Additionally, onions may be bred and grown to mature at smaller sizes. Depending on the mature size and the purpose for which the onion is used, these may be referred to as pearl, boiler, or pickler onions. (However, true pearl onions are a different species.) Pearl and boiler onions may be cooked as a vegetable rather than an ingredient. Pickler onions are, unsurprisingly, often pickled.
Onions are available in fresh, frozen, canned, caramelized, pickled, powdered, chopped, and dehydrated forms.
Onion powder is a spice used for seasoning in cooking. It is made from finely ground, dehydrated onions, mainly the pungent varieties of bulb onions, which causes the powder to have a very strong odor. Onion powder comes in a few varieties: white, yellow, red and toasted.
|Nutritional value per 100 g (3.5 oz)|
|Energy||166 kJ (40 kcal)|
|- Sugars||4.24 g|
|- Dietary fiber||1.7 g|
|- saturated||0.042 g|
|- monounsaturated||0.013 g|
|- polyunsaturated||0.017 g|
|Vitamin A equiv.||0 μg (0%)|
|Thiamine (Vit. B1)||0.046 mg (4%)|
|Riboflavin (Vit. B2)||0.027 mg (2%)|
|Niacin (Vit. B3)||0.116 mg (1%)|
|Vitamin B6||0.12 mg (9%)|
|Folate (Vit. B9)||19 μg (5%)|
|Vitamin B12||0 μg (0%)|
|Vitamin C||7.4 mg (9%)|
|Vitamin E||0.02 mg (0%)|
|Vitamin K||0.4 μg (0%)|
|Calcium||23 mg (2%)|
|Iron||0.21 mg (2%)|
|Magnesium||0.129 mg (0%)|
|Phosphorus||29 mg (4%)|
|Potassium||146 mg (3%)|
|Sodium||4 mg (0%)|
|Zinc||0.17 mg (2%)|
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