Onions

Along with garlic, onions come from the allium family of plants. They contain compounds containing sulphur, which are responsible for the pungent smell and health promoting effects. Onions also contain a significant amount of chromium a trace element known to respond to insulin and quercetin.

This is beneficial because quercetin is a flavonoid found to reduce the size and number of pre-cancerous lesions in the human gastrointestinal tract.

Onions should be stored away from direct light, at room temperature and in a well-ventilated container. They should also be kept away from potatoes as they absorb moisture, causing the potatoes to spoil.

Quick uses for onions

Jazz up plain steamed rice with finely chopped spring onion and toasted sesame seeds.
Caramelised onion is a great addition to a homemade pizza.
Finely chopped red onion is divine when combined with avocado, chopped tomato, lemon juice and coriander. Guacamole meets salsa!

http://nz.lifestyle.yahoo.com/b/newideanz/812/superfood-of-the-week-onions/