Who is the man on food network that show Mission Impossible who has a certain amount of time to make lot food?

The man you are referring to is Chef Robert Irvine, host of the Food Network show "Restaurant: Impossible". In this show, Chef Irvine has a limited amount of time, typically 2 days, to turn around failing restaurants. He works with the restaurant staff to improve the menu, revamp the decor, and create a more efficient business model.