Set oven Gas Mark 6, 200°C (400°F). Line four individual tart tins with the pastry. Sprinkle some ground almonds on the base of each one. Then add the apple and enough sugar to sweeten.

Here, I’ve used individual tart tins, but a larger one works just as well. Feel free to use your choice of nuts, such as walnuts and pistachios, or whatever you have on hand. Cook on a very low ...