Start making the dough by cutting the butter into cubes.
Whisk together the flour, the salt, the butter until you get an even dough.
Make a well in the centre, now add the egg to it and start to knead gently with your fingers.
Finally add the water to obtain a smooth quiche base. Shape the dough into a ball and wrap it in cling film. Put into the fridge for about 1 hour.
Filling
In the meantime prepare the filling.
Cut the ends of the asparagus and cook them for 10 minutes.
Beat the remaining eggs, add the liquid cream, the cheese and the nutmeg.
All
Preheat the oven to 180°
Grease a a tart tin (if round 26cm). Roll out the dough on a floured surface until and lift it into the tin with a rolling tin. Prick the bottom several times with a fork, cover it with baking paper, weigh down with baking beans and cook blind for 15 minutes.
Distribute the asparagus over the dough, then pour the filling over them. Bake for 30 minutes.