Complex sentence: Indian naan bread, by contrast, is a yeast-leavened bread, similar to "kulcha", which in South Asian cuisine is a bread-like accompaniment, made of processed flour (maida) leavened with yeast.
Split into simpler sentences: Indian naan bread, by contrast, is a yeast-leavened bread. A "kulcha" in Indian cuisine is a bread-like accompaniment, made of processed flour (maida) leavened with yeast.