Making an entire meal from scratch is a challenge -- now imagine doing it in only 30 minutes! Four chefs who specialize in scratch cooking take on two grueling rounds, making everything from the bottom up. First, the chefs have to make a sandwich and side incorporating ingredients from Guy Fieri's grocery list. Then, in the final round, the chefs have a $20 budget to make their best pasta dish out of practically nothing to win a shopping spree worth up to $20,000.