Sadira uses a magic spell to trade lives with Jasmine, so Aladdin can love her. Now Sadira is a princess and Jasmine is a street rat. The spell effects everyone except for the animals ( Abu, Iago, and Rajah), so they save the day.
At one point, Iago calls Sadira "little orphan sandy," referencing the comic strip Little Orphan Annie.
Edit
The title of this episode could be a play on the word sandwich.
Edit
Iago mentions the ASPCA. The ASPCA is the American Society for the Prevention of Cruelty to Animals, however, in this case it could mean Arabian instead of American.
Edit