Defrost the spinach. In the meantime peel and finely dice the onions. Peel garlic and chop finely. Heat 1 teaspoon of olive oil in a small pot. Fry half of the onion cubes and garlic in it until transparent. Add the tomatoes and bring to the boil.
Season with salt, pepper and sugar. Put spinach in a gauze cloth and wring out well. Heat 1 teaspoon of olive oil in a saucepan. Fry the rest of the onion cubes until transparent. Add the spinach and sauté for 5 minutes. Brush dough plates with water and lay on top of each other. Spread the spinach evenly on top. Leave a 5 cm wide rim all around. Cover the spinach evenly with slices of ham. Drain the feta, cut into cubes and sprinkle evenly on the ham. Roll up the dough from the long side and fold in the ends. Place the roll of dough on a baking tray lined with baking paper.
Spread the spinach evenly on top. Leave a 5 cm wide rim all around. Cover the spinach evenly with slices of ham. Drain the feta, cut into cubes and sprinkle evenly on the ham. Roll up the dough from the long side and fold in the ends. Place the roll of dough on a baking tray lined with baking paper. Whisk the egg yolk and brush the roll of dough with it. Bake in the preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for 20-25 minutes. In the meantime heat up the tomato sauce. Remove strudel from the oven, sprinkle with sesame seeds and cut into 8 slices. Serve strudel and tomato sauce hot. Garnish with oregano
Whisk the egg yolk and brush the roll of dough with it. Bake in the preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for 20-25 minutes. In the meantime heat up the tomato sauce. Remove strudel from the oven, sprinkle with sesame seeds and cut into 8 slices. Serve strudel and tomato sauce hot. Garnish with oregano