1.Preheat the oven to 200°C (180°C fan-forced). Line a 24cm fluted tart tin with the pastry sheets; refrigerate for 30 minutes.
2.Line the tart case with baking paper and fill with baking weights or dried beans or rice. Bake the pastry for 10 minutes or until just golden.
3.Remove the paper and weights, and bake for a further 10 minutes or until browned lightly and cooked. Protect the sides of the pastry with foil, if necessary.
4.Cut the apricots in half and remove the stones. Arrange the apricot halves on the base of the tart tin, cut side up.
5.Heat the butter in a saucepan over high heat. When it begins to froth and turn golden brown, gradually pour it into the egg mixture and beat for 1 minute.
6.Pour the filling over the apricots and bake for 35-40 minutes or until the filling has set.