Shortcrust pastry, or brisée pastry, is an excellent base for savory tarte tatin and in general for savory pies.
It is prepared starting from cold butter, so you don’t have to remember to recover the butter from the refrigerator in order for it to soften at room temperature (as it happens when you prepare sweet shortcrust pastry and you start mixing softened butter and sugar).
The cold butter, cut into small pieces, must be worked with flour to create the so-called “sand”: the two ingredients must be mixed with fingertips until the butter has been completely absorbed by the flour and there will be no visible pieces.
In order to simplify this procedure, you can also use a food processor: pour the flour and the butter cut in small pieces into the container, blend until you will obtain the sand and there will be no visible pieces of butter.
The most important thing to keep in mind, whether you are working by hand or using the mixer, is not to heat the dough: the butter, as a matter of fact, must not melt and release fat. If your hands are too hot, wash them under cold water in order to lower the temperature.
Once the sand is obtained, add water (chilled) and salt. If you like, you can replace the water with the same quantity of chilled milk.