Add the cabbage chopped in 2-3 cm pieces in the mixing bowl and grate by using 4 sec – Speed 4. Repeat until you grate the whole cabbage. Move the grate cabbage into a large bowl and set aside. Chop the onion by adding it (cut in half) in the mixing bowl and select 5 sec – Speed 5;
Use a large pan or a wok to saute the onion and the cabbage reserved at the previous step. Add salt, pepper, red paprika and tomato juice as you like. Cover the pan with a lid and let it cook for aprox. 1 hour. Mix it from time to time;
After the cabbage becomes soft and tasty, let it cool;
Meanwhile, cut the dough in two pieces. Roll up each dough on a floured surface to create two similar dough sheets;
Cover the first sheet with the cabbage mixture and use the second sheet to overlay. Using your fingers, stick the two layers of dough together. Use a fork to prick the top layer;
Mix the egg yolk with a spoon of milk and add it on top of the top layer of dough. Add salt and pepper, based on your preferences;
Bake in the preheated oven for 20-30 min at 200℃