In a big bowl combine flour, butter cut into chunks, water, salt and egg. Knead into a smooth dough. Wrap in cling film and freeze for 10 minutes.
Meanwhile heat oil in a pan and sautee veggies for 7 minutes or until done.
For the sauce combine cream, 3 eggs, paprika, pepper and cheese. Set aside.
Now line the base of a spring form pan (26 cm in diameter) with parchment paper. Roll out 2/3 of the dough into a circle of 26 cm diameter and place in the pan. Make sure to remove the sides of the pan when pre-baking the dough for the base. Prick with a fork and bake at 200°C/400°F for 12 minutes.
Take out and allow to cool for a minute. Grease the sides of the pan and place them around the bottom again.
Form rest of the dough into a long rope and use this as the sides of your quiche. It works best if you place them on the bottom and use your fingers to connect them with the base and a spoon to form a high side.
Fill in the veggies and pour the sauce over them.
Bake another 25-30 minutes on the lower rack of your oven.