It's fast food week, and with a place in the semi-final at stake, the final five cooks level up instant noodles and attempt to bash out Mexican fast food in just 90 seconds. Guest judge Sarah Newman reveals that the prize is for the winning cook to get their salsa recipe on the menu nationwide in over 50 Tortilla restaurants. The bottom two must battle it out in the most challenging Knives Out elimination and after a dramatic contest against the clock, one cook is sent home narrowly misses out on a place in the semi-final