Kalonji is a plant from which the seeds have been traditionally used for the treatment of diabetes, pain, and digestive tract problems, among other diseases and conditions. It may be effective for weight loss when combined with a low calorie diet.
Let's just simply call them nigella or kalonji (from Hindi). However you choose to name this spice, what it lacks in aroma — it has just a hint of a savory scent — it makes up for in taste. Nigella seeds have an oregano-like quality with herbaceous notes, a slight bitterness and a warm, toasted-onion flavor.
