Foodie favourite Valentine Warner takes on Thomasina Miers, founder of Mexican restaurant chain Wahaca, as the pair cook up a Central American feast. Simple: Eat with your fingers first. Thomasina goes for authentic aguachile and sangrita. Valentine keeps it classic with guacamole and a margarita. Classic: Nothing says Mexican like tacos. Thomasina fills hers with potatoes, chorizo and chipotle salsa. Valentine prefers poblano chillies for his rahas tacos. Ultimate: Time for the showstoppers. Thomasina gets to work on a steak burrito made with home-made tortillas, while Valentine keeps it colourful with sea bass red and green.