The fastest form of “fast food” consists of pre-cooked meals kept in readiness for a customer’s arrival (Boston Market rotisserie chicken, Little Caesars pizza, etc.), with waiting time reduced to mere seconds. Other fast food outlets, primarily the hamburger outlets (McDonald’s, Burger King, etc.) use mass-produced pre-prepared ingredients (bagged buns and condiments, frozen beef patties, vegetables which are prewashed, pre-sliced, or both; etc.) but the hamburgers and french fries are always cooked fresh (or at least relatively recently) and assembled “to order” (like at a diner).