Preheat the oven to 190 C / Gas 5. Mix together flour and salt in a bowl then rub in the margarine. Using a knife, mix together whilst adding water until it becomes a stiff dough.
Turn dough out on to a floured surface and roll out big enough to fit an 18cm flan dish. Add half the cheese into the bottom of the flan dish. Set aside.
Fry the bacon and allow to go cool.
Beat the eggs and milk together and add a pinch of salt and pepper. Place the cooled bacon in the bottom of the flan dish and pour over the egg and milk mixture.
Bake in the oven until golden brown, about 40 minutes.
Serving suggestion
Serve with chips, jacket potatoes or even boiled potatoes and veg as a main meal. This can also be eaten as a snack.