We mentioned this in our New York Times roundup today, but it deserves an extra little shout-out. First Lady Michelle Obama will make a guest appearance on Food Network when she challenges Bobby Flay, Mario Batali, Emeril Lagasse, and White House executive chef Cristeta Comerford to a special Iron Chef battle. The secret ingredients? Produce grown in the White House garden. The episode will air on Sunday, January 3 at 8 p.m. EST.