Mix together flour, salt and cold butter in a food prosessor og by hand until you are left with a dough.
2
Add some cold water until you are left with a smooth dough.
3
Let the dough rest in the fridge for 20 minutes.
4
Roll out the dough between two sheets of baking paper to prevent the dough from sticking. Transfer the dough to an ovenproof dish and use a fork to poke holes on the bottom and on the sides of the dough.
5
Bake the dough at 200 degrees celcius for about 10 minutes.
6
Fry the spinach in a frying pan together with some olive oil and one clove of garlic until the spinach shrinks.
7
Cut the red onion into strips.
8
Whisk eggs and heavy cream in a bowl. Add the spinach, red onion, sun-dried tomatoes and some salt and pepper.
9
Add the egg mixture to the pre-baked pie. Top with feta cheese and bake for another 25-30 minutes.
10
Let the pie rest for 15 minutes before serving. It can both be served warm and cold.