Peel and chop the onions. Fry half of the onions in 1 tbsp. hot oil. Add the frozen spinach and 7 tbsp. water, cover and steam for about 10 minutes until the spinach is defrosted. Then cook open for about 6 minutes until all the liquid has evaporated.
Season with salt, pepper and paprika. Let cool down briefly and chop coarsely.
Wash and finely dice the tomatoes. Fry the chopped tomatoes in 1 tbsp. hot oil until crumbly. Fry the rest of the onions and tomatoes briefly. Stir in tomato paste. Season with salt, pepper and possibly cumin.
Line two baking trays with baking paper. Place 1 pizza dough without paper on each tray and cut crosswise into 4 strips. Spread the spinach and minced meat filling separately on 4 pieces of dough each, leaving approx. 1 1⁄2 cm of edge free all around.
Fold the long sides towards the middle so that the ends lie on top of each other and "boats" are formed. Press on well.
Crumble the feta and sprinkle on the spinach. Spread the edges of the dough with the rest of the oil and sprinkle with sesame seeds. Bake in a hot oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer) for about 20 minutes.