Complex sentence: The growth in popularity has recently led to referring to the flat-bread itself (roti) that surrounds the filling as a "roti skin" or "roti shell", a practice that is now common in both restaurants and commercial companies.
Split into simpler sentences: The growth in popularity has recently lead to referring to the flat-bread its self (roti) that surrounds the filling as a "roti skin" or "roti shell". A practice that is now common in both restaurants and commercial companies.