Kali jeera, also known as black cumin or nigella seeds, is a spice commonly used in South Asian and Middle Eastern cuisines. Despite its name, it is unrelated to regular cumin and has a distinct, slightly bitter flavor with a hint of onion-like taste. These small, black seeds are often used whole or ground to add depth and aroma to dishes such as curries, bread, and pickles. Additionally, Kali jeera is believed to have various health benefits, including aiding digestion and promoting overall well-being.