First, scratch the apricots crosswise on the round side, pour hot water over them and peel them. Then halve and stone and cut into bite-sized pieces.
Separate the eggs and beat the egg whites into very stiff snow (this works very well if you add a pinch of salt).
In a mixing bowl, mix the flour mixed with 1 teaspoon of Mondamin with the sour cream, then stir in cane sugar, vanilla sugar and egg yolks and season to taste with the lemon zest. Loosely fold in the stiff egg whites.
Place the apricot pieces in a well-buttered casserole dish and pour the cream mixture over them. Bake the casserole in an oven preheated to 160 ° C (O / U heat) for about 30 - 40 minutes.
A wine foam sauce or vanilla sauce goes well with it.