Onion seed

Also known as: 
Kalonji, Nigella seeds

Onion seeds, appropriately known as the "seeds of blessings" are considered to be one of the greatest healing herbs of all times. Kalonji, which may also be called nigella, refers to small black seeds grown on Kalonji bushes, which are grown widely through India. Kalonji is both flavouring, added to a variety of traditional foods, and an herbal remedy that has been touted as the magic bullet for a variety of ailments. Kalonji seeds are about the same size as sesame seeds, though they are a little more triangular instead of oval shape. 

Commonly used in: 
tossing onto breads, such as naans and savoury biscuits or pastries, as well as over salads. They may be added to any type of curry or stew, and to dal. Nigella is an essential ingredient in the Bengal mix of five whole spice seeds known as panch phora or panch puran.

Health benefit: 
Among other things, the seeds help fight against respiratory ailments. The seed acts as an antihistamine which helps to reduce the negative symptoms of allergy sufferers.  It is also a strong anti-oxidant and helps cleanse the body of toxins. The black seeds provide a rich supply of polyunsaturated fatty acids. They help to regulate the metabolism, balance insulin levels, regulate cholesterol, improve body circulation, and promote healthy liver function.