For the tomato sauce, peel and finely dice the onion and garlic. Heat 1 tablespoon of oil in a saucepan. Fry the onion and garlic in it. Add the tomatoes. Season with salt, pepper and sugar. Simmer open for about 10 minutes.
Remove from the heat and let it cool down.
Crumble yeast for the dough. Mix with 1 tablespoon of sugar. Mix 500 g flour and 1 tsp salt. Add yeast, approx. 300 ml lukewarm water and 3 tbsp oil. Knead to a smooth dough and let it rise for about 1 hour.
Grate the cheese roughly. Knead the yeast dough briefly, roll out to a square (approx. 50 x 50 cm) and spread with the tomato sauce. Sprinkle cheese evenly on top, cover with salami. Cut the dough square into 6 strips.
Place 3 strips on top of each other, placing the top strip with the occupied side facing down. Cut both dough stacks crosswise into 6 pieces each.
Preheat oven (electric cooker: 200 °C/circulating air: 175 °C/gas: see manufacturer). Grease the box form (approx. 25-30 cm length; approx. 1 3⁄4 l content) well. Place vertically. Layer pieces of dough in the mould.
Cover and leave to rise for about 30 minutes. Bake in a hot oven for 30-40 minutes. Remove from the oven and leave to cool for about 15 minutes. Carefully turn the bread out of the tin.
It's good with dip. For this, peel 2 garlic cloves and chop them finely. Mix with 150 g mayonnaise and 50 g whole milk yoghurt. Season to taste with salt and pepper. Coarsely chop 75 g Kalamata olives (without stones) and stir into the dip.