
Place the ingredients for the base in a large bowl and pour in most of the water - bring together with a spatula to make a soft, slightly sticky dough - you may not need to add all the water or a little bit more depending on the flour used. Knead until well mixed and smooth then lightly grease the ball of dough and cover with cling. Leave in a warm spot to prove for one hour.
When the dough has proved, grease your hands and shape the dough into a sausage shape the length of your tart tin (mine is 12 x 35 cm big with a loose bottom - see note below for directions for a larger round tart tin). Place the dough in the tin and press it out to fill the base and come up the sides. You may curse my name as you do this but it will stretch and fit! I usually tack it over the rim of the tin in places to ensure it doesn't fall down the sides.
To make this in a more common 9 inch round tin, simply add an extra rasher of bacon, use a medium onion, increase the sour cream to 150g, make sure your eggs are definitely large and use a little extra cheese. Use the dough recipe for my Chicken, Chorizo and Asparagus tart for the base.
Serve with a green side salad whilst still warm. It freezes exceptionally well wrapped first in cling film then tin foil and you can reheat it on a baking sheet for 20 minutes once thawed.