Pistachio cream
Mix the butter and the sugar, add the egg, then the pistachio powder. If you can't find pistachio powder in the shops, just blend 50g of pistachio. Once the mixture is thick, the cream is ready.
Assembly
Take out your pie crust and place it in your dish. Top your pie crust with the pistachio cream and then arrange the apricots. Fold the pastry over the fruit, tightening the edges a little.
Arrange the pistachio slivers on top.
Cooking
Bake for 20 to 25 minutes at 180 degrees.