Knead all ingredients for the dough in a wide bowl with a mixer until smooth and shiny dough, form into a ball. Brush with melted butter. Rest dough under warmed baking dish for 40 to 50 min. In the meantime, remove peel from onions, dice, defrost spinach. Sauté onions in oil, add spinach, steam, then cool. Drain the liquid produced during steaming and season the vegetables with pepper, salt and finely chopped herbs. Mix cream cheese with egg yolk and add to the spinach mixture. Pull out strudel dough over the back of your hand or roll out thinly on a floured dishcloth. Brush with a little liquid butter, spread spinach mixture, roll up the strudel by means of the cloth from the narrow side. Place on a greased baking tray, brush with the remaining butter and bake. Serve with tomato sauce.
Circuit: 200 to 220 degrees , 2nd slide bar v. U.
190 to 200 degrees , convection oven 40 to 45 min.