Woo the opposite sex with an exotic dish - Cauliflower Broccoli Gratin. Gratin is a food preparation technique where you put a layer (of breadcrumbs, grated cheese and butter) above an ingredient mixture (of vegetables e.g. cauliflower, broccoli, potato, tomato, carrot etc), bake it till a golden crust forms at the top. You can try a meat based ingredient mix too. Read on for how to prepare a vegetable based Gratin in easy steps.