Mushroom & leek tart with apple salad

Pastry needs a high heat to rise properly so get your oven up to temperature before you start; it helps set the butter and flour quickly. The mushrooms will release a lot of moisture when you start frying them; stick with it as this will gradually disappear. The pan will still be hot when adding the egg into the mixture, so it may scramble slightly. Keep stirring, to prevent it solidifying.