On the new "Junior Edition" of MASTERCHEF, America's top 24 junior home cooks will enter the kitchen for the first time and jump right into their first mystery box challenge. Each junior home cook is tasked with preparing a signature burger and one side. The winner of the challenge will have a significant advantage and will select the main ingredient that the remaining contestants must use in the season's first elimination round. The junior home cooks with the best dishes will advance in the competition in the all-new "Junior Edition: New Kids on the Chopping Block" Season Four premiere episode of MASTERCHEF airing Friday, Nov. 6 (8:00-9:00 PM ET/PT) on FOX. (JRM-401) (TV-PG).