The seventh season of "MasterChef" sees another change in the judging panel, with chefs Gordon Ramsay and Christina Tosi joined by a different special culinary guest judge -- including Wolfgang Puck, Aarón Sánchez, Edward Lee, Kevin Sbraga and Richard Blais -- each episode. The experts evaluate the skills of amateur cooks from across the country who are faced with mystery-box challenges that require them to work with the same ingredients; team challenges (including restaurant takeovers); and the dreaded pressure tests that determine who is eliminated from the competition. In the end, only one cook wins the title, the trophy -- and a lucrative prize.