this can be halved very nicely if you use a yolk for the whole egg.
Whirl dry ingredients in a food processor.
Add butter, cut in slices or diced, and pulse until the largest butter chunks are no larger than peas.
Add the egg and whirl some more until the mixture looks like very lumpy cornmeal and the egg seems well-integrated.
Place mixture in a bowl and add ice water a few tablespoons at a time, tossing with a spatula until the mixture just holds together when pressed.
Divide into portions, shape into rough thick discs, wrap in plastic wrap and chill at least 1/2 hour. You may freeze any you are not going to use immediately.
Roll out with a pastry cloth and stocking, to minimize using additional flour.
Chill after placing in your baking pan. Bake either blind (tan) or pre-bake (golden brown), using whatever you use to keep the bottom from puffing up, or with filling, at 350º until your filling is done.
Use only really good seasonal fruit for this, unless you have done the freezing yourself! For stone fruits (peaches, apricots, cherries and for pears, you may place thin slices of almond paste to cover the bottom of the crust. Dot butter over the filling, and glaze with a suitable jam, softened, placing the tarte back in the oven for 5 m or so.