Shrimp, Leek and Celery Quiche

For the dough, pile flour on work surface and mix with salt and make a well in the center . Cut cold butter into small pieces and spread evenly over flour. Place egg in the middle.  

Chop all ingredients with a sharp knife until mixture resembles coarse crumbs. Quickly knead into a dough with hands and shape into a ball and wrap in plastic wrap and refrigerate for about 30 minutes. 

Roll out dough into a thin layer between 2 sheets of plastic wrap and line greased quiche pan with dough.

For the filling, rinse leeks, drain and pat dry and halve lengthwise and cut into thin strips.

Rinse celery, peel and cut into thin slices.

Heat butter in a pan until frothy and sauté leeks and celery and add 1/2 cup water to pan.