Gather and weigh your ingredients
Sift Flour in a round bowl, add sugar, salt & butter
Lightly beat egg and add a drop of water and the vanilla
Work/rub flour and butter with fingers to a sandy texture. Add egg, rolling mixture into a ball. Or use the pulse setting on a food processor until it is just mixed through, then add the egg, pulse again and transfer to the work surface to knead gently and roll into a ball.
Wrap flat in cling film and chill 15-20 minutes [ Note 1 ] Heat oven to 180c [approx 350F] and place rack in the middle
Remove from fridge [15 minutes before you roll ] Roll out pastry dough to the size and thickness you require
Gently place the pastry dough into the baking tin, making sure it is pressed completely along the edges and trim evenly across the top.
Place a round of greaseproof paper in the bottom of the uncooked tart case and add some baking beads.
Using a pastry brush, brush the sides of the tart case with an egg wash Bake the tart case on 180c [ 355 F ] for 15 minutes or until golden. Remove from the oven and place on a wire rack.
When the baking beads are cool enough to handle, remove them and the paper.