Peel and chop the onion. Wash, pluck and finely chop the marjoram. Knead with minced meat, tomato paste, half onion, salt and pepper. Form 8 small meatballs from the mixture. Fry in 1 teaspoon of hot oil on each side for about 3 minutes
Cut cheese slices diagonally in half. Wash tomatoes and cut into 8 slices. Spread a thin layer of remoulade on each slice of bread, cover with 1 slice of tomato, 1 meatball and 1/2 slice of cheese.
Place breads on a baking tray and bake in a preheated oven (electric range: 200 °C/recirculating air: 175 °C/gas: level 3) for 6-8 minutes
Mix the remaining onion, vinegar, salt, pepper and sugar. Stir in 1 tsp. oil. Clean and wash the salad and drain well. Arrange the breads with salad and sauce