Complex sentence: This dish is a main staple of the Lebanese and Palestinian diet today in America and the Middle East and used to be considered a staple in the poor man's diet, but today, is considered a high protein, balanced healthy food by many Americans.
Split into simpler sentences: This dish is a main staple of the Lebanese and Palestinian diet today, both in the Middle East and in America. At one time it was regarded as a poor man's dish, but today it is considered a high protein, balanced healthy food by many Americans.