Simplify the following text for a Grade 9 native English-speaking person.
Original: The zest of the fruit is used in creole cuisine and to impart flavor to `` arranged '' rums in the Martinique , RÃ union island and Madagascar .
Simplified: As for the zest , it is widely used in creole cuisine and to impart flavor to `` arranged '' rums in the RÃ union island and Madagascar .