Sold whole or grounded

This flavorful small black seed is often used in Jewish rye bread, flatbreads and savory pastries.

Asia
It is also mixed with other seeds, such as mustard, cumin, fennel and fenugreek to make up a blend know as panch phoron which is used in Benal cooking for beans and vegetables dishes. 

Known Kolonji in India, this seed is an ingredient in many curry and garam masala recipes.

Middle East
Charnuska is used also in traditional Lebanese and Armenian cuisines.