For the spinach strudel, briefly roast the pine nuts. Wash the spinach leaves, boil and drain, then mix with pine nuts, garlic and feta cheese.
Roll out the strudel dough sheet a bit and fold in the sides. Spread creme fraiche in the center and pour in mixture.
Fold in the middle, whisk the egg and brush the strudel with it.
Bake the strudel in the preheated oven at 200 °C for about 20 minutes. Bake until the dough is golden yellow.