To start, rub together the plain flour, caster sugar and butter. This will create a breadcrumb effect. Whisk 1 egg and slowly add it to the mixture, it will start to make a dough, add a little water at a time until the desired dough consistency is met. The dough should then be rested for half an hour in the fridge to make it easier to roll out.
After the dough has been rested, roll it out to fill a 12" quiche tin, ensuring the tin has been greased with butter.
The pastry should then be blind baked at 160ºC until golden brown.
To make the filling, whisk together 10 Eggs with the other ingredients to a smooth thick consistency. Once the mixture has been mixed, pass it through a sieve to ensure there are no lumps. Place the filling into the pre baked pastry base giving it a grating of nutmeg on the surface before returning it to the oven to cook at 120ºC for 40 minutes or until set.