Prepare a yeast dough from the first 6 ingredients and place on an oiled baking sheet or baking sheet lined with baking paper. Spread half of the Emmentaler on top and cover with the apple slices.
Sprinkle with salt, pepper and sugar. Then spread the blue cheese and the rest of the Emmentaler on top. Bake for 25 - 30 minutes at 180 ° C (fan oven).