Complex sentence: The main ingredient is a variety of chickpea (called चना "chana" or "kala chana"-meaning "black chana")-they are much smaller (about half the diameter) with a stronger flavour, and firmer texture when cooked.
Split into simpler sentences: The main ingredient is a variety of chickpea called "chana" (चना) or "kala chana" meaning "black chana". They are much smaller (about half the diameter) with a stronger flavour, and firmer texture when cooked.