Peel and wash the potatoes and cut them into small cubes of approx. 1⁄2 cm. Blanch in boiling salted water for about 5 minutes. Drain and let drain well. Mix with 1⁄2 TL pepper. Let the strudel dough rest at room temperature for about 10 minutes.
Melt the butter. Line a baking tray with baking paper. Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer).
Place 1 sheet of dough on a tea towel. Spread with some butter. Spread approx. 1 tbsp. cream cheese on the lower edge of the dough to form a narrow strip. Spread 2-3 tbsp. potatoes on top. Roll up the dough sheet using the tea towel.
Cut the roll in half crosswise, open both halves of 1 auger each and place them on the baking tray. Process remaining ingredients in the same way. Sprinkle snails with sea salt. Bake in a hot oven for about 15 minutes.