Wash the apples and slice them into thin wedges.
Squeeze the juice of half a lemon over the sliced apples.
In a saucepan, cook the apple slices in the Dairygold and sprinkle with the sugar. Cook over a moderate heat for 5-7 minutes, stirring gently from time to time.
Remove from the heat and allow to cool.
Using a blender or food processor, blend the eggs, caster sugar, crème fraîche, Calvados, vanilla extract and cinnamon until the mixture is smooth and creamy.
Arrange the apple slices in the pastry case. Pour the egg mixture on top.
Bake for 30 minutes at 180°C (Gas Mark 4)Allow to cool.
*Please note that this recipe contains a small amount of alcohol (Calvados).