Mushrooms (I have champignons), cut, send to the pan. Cut the leek into thin rings. When the mushrooms are a little fried, send the leeks to the pan.
Season with salt, pepper, and fry everything together for 5-7 minutes. Cool down. Roll out the finished dough to the size of the mold. Put the dough in a mold.
Preparing the fill. Beat the egg with sour cream. Grate the cheese on a fine grater and add to the mixture of sour cream and egg. Transfer the filling into the prepared dough mold. Pour the filling over the cake.
Put the quiche in the oven and bake for 30-40 minutes at 180 degrees.