Onions peel, in fine cubes cut. Heat 2 tablespoons of oil in a pot. Fry the onions in it. Add the tomatoes and chop them coarsely. Bring to the boil and simmer for about 10 minutes. Season to taste with salt, pepper, sugar and Sambal Oelek.
Dice the bacon and fry until crisp in a pan without fat. Take out and let drain. Remove the crusts from toast and cut into cubes. Heat 4 tablespoons of oil in a large frying pan. Fry the bread cubes in it until golden brown, drain.
Wash the lemon with hot water, grate dry and peel the lemon peel with a zest ripper. Wash parsley, dab dry and chop. Mix bread cubes with bacon, lemon peel and parsley and serve with the tomato soup.