Tarts are a delicious way to start a meal or to serve an elegant nutritious lunch. This recipe selection includes both savoury and sweet versions. Vegetarians will love the butternut squash or beetroot tarts. For fish lovers there is a leek and smoked mackerel quiche or a sushi Salmon tart. Dessert is a heavenly lemon tart or a pear and yogurt version that redefines the idea of a tart.