The top 17 home chefs return to the kitchen for their second Mystery Box Challenge, but this time with a twist - one region will begin the challenge 10 minutes behind the rest. With one box per region, the chefs must race against time to incorporate flavors from home in their dishes and impress the judges in the all-new “Birds of a Feather Mystery Box” episode of MasterChef: United Tastes of America airing Wednesday, August 2 (8:00-9:02 PM ET/PT) on FOX.