While many full-time veggies would tell you to reach for Ottolenghi's vegetarian cookbook Plenty, in my opinion, Ottolenghi Simple (£16, originally £25) is a better place to start. From the crushed courgettes to the rice noodle salad with cucumber and poppy seeds, every recipe is easier than you think and none of the ingredients are hard to find. The crushed courgettes with oodles of garlic is a good place to start.