In hot weather, turning on the oven is the last thing you want to do. So a good no-bake recipe can be a real lifesaver. This tart has a bit of everything going on: a crunchy ginger base and a sweet yet sharp fruity filling, the colour of sunshine. Getting your hands on good, ripe Indian mangoes isn’t always easy, so I’ve assumed you’ll use tinned mango, but have also included instructions for fresh.