Dissolve the yeast in the water, place in a bowl and mix with the milk, oil, sugar, salt and 2 egg whites. Slowly knead in the flour. Add flour until you have a smooth and soft dough. Let rise for 1 hour.
Take walnut-sized pieces of the dough and press them flat in your hand about the size of the palm of your hand. Spread some margarine in the middle. Shape to your heart`s content, e.g., Kringel, and place in a greased tray. Whisk the egg yolks and spread them on the rolls. Sprinkle with sesame seeds and black cumin.
Bake in a preheated oven at 175 ° for 20-30 minutes.