Kalonji refers to the small black seeds of the Love-in-a-Mist plant. Sometimes they are confused with "onion" seeds or black cumin or caraway. The seeds are deep black and sharp-cornered.
Kalonji seeds are reported to be beneficial for the respiratory system. They have also been shown to have anti-bacterial and anti-inflammatory properties.
Crushed kalonji has an aroma somewhat like oregano. They are normally used whole, mainly in breads. The seeds taste pleasantly bitter and slightly pungent.
Kalonji seeds are generally sautéed in ghee or dry-roasted to release the aroma and flavor and then added to vegetable dishes.