Nigella seeds are used widely in India, the Middle East, and North Africa to add a uniquely difficult to pinpoint flavor. It's at once peppery, oniony, herbal like oregano, and even nutty. They're great for topping naan, in salads, in korma, and to flavor preserved lemons. Use nigella in curries, stir-fry, pilaf, pickles, and maybe as a bagel topping.
 
Note about refill bags: 1x refill bag size is the same volume as a large jar. 2x refill bag size is double the volume of a large jar. 3x refill bag size is triple the volume of a large jar.