Ajwain, also called carom seeds, comes from the Carum copticum plant. These small, pale brown seeds have a strong, spicy smell like thyme and a sharp, slightly bitter taste. They are often used in Indian cooking to flavor snacks, breads, and lentil dishes. Ajwain grows in India, Iran, and nearby regions. The seeds contain small amounts of calcium and iron. Known for their bold taste, they are used in small amounts to enhance recipes.