Isa,
basically you can make the Apfelstrudel dough in three different ways:
1)An egg-free dough that we italians call "pasta matta" - about the same we use for vegetable pies. It is made of wheat flour, a limited amount of fat (butter or vegetable oil), a pinch of salt and water enough to get a smooth and elastic dough. This is the dough formerly used to make Apfelstrudel.
2)An egg containing, shortcrust pastry-like dough. Although reported in many recipes, personally I can't recommend it as, in my experience, it's too rich to be rolled up thin enough without breaking.
3)A puff pastry dough. Although not traditional, it works very well, and many local pastry shops use it now to make Apfelstrudel. I must admit that, when I have few time or feel particularly lazy, I buy a roll of fresh, already made puff pastry dough and make my best Apfelstrudel

, otherwise this is my recipe "by scratch":
Ingredients:
For the dough:
250 grams white wheat flour
50 grams butter
1 pinch of salt
fresh water enough to get a good dough (suppose 4-5 tbsp)
For the filling:
-1 kg "Renette" apples
-100 grams sugar
-50 grams raisins, soaked in water and squeezed
-40 grams pine nuts
-1-2 tsp cinnamon
-grated rind of 1 lemon
-100-120 grams of melted butter
-100 grams breadcrumbs
Make the dough, knead it until very elastic and keep it aside in a warm place for 30-40 mins.
Cut the apples in thin slices, put them in a bowl with the sugar, give them a mix and keep aside for 30 mins, then discard the excess of liquid. Add the raisins, pine nuts, cinnamon, lemon rind and mix.
Put the dough on a large sheet of parchment paper (hope the word is correct, I mean the paper you can use for baking) and roll it to a rectangular shape, almost transparent as you already know. Brush with half of the melted butter and sprinkle with breadcrumbs, then cover the two thirds of the dough with the filling.
Roll up the strudel, helping yourself with the paper, and carefully seal it. Brush the surface with the remaining melted butter.
Transfer the strudel, with the parchment paper, on a plate and bake at 350° C for 1 hour. Cool it down, then remove from the paper and sprinkle with icing sugar.
Good luck!
Pongi