Peel and chop the onion. Wash the basil, pluck the leaves from the stalks and chop them except for a little to garnish. Wash, clean and dice the tomatoes. Heat 1 tablespoon of oil. Sauté the onion for about 4 minutes until translucent.
After 2 minutes add the tomatoes and tomato paste. Deglaze with broth, bring to the boil briefly and season with salt, pepper and sugar. Whisk eggs for the escalopes. Fill each 2 cheese slices with a slice of ham. Turn one after the other in flour, egg and breadcrumbs. Press the breadcrumbs firmly. Turn once more in egg and breadcrumbs. Heat 3 tablespoons of oil and fry 3 escalopes for about 5 minutes. Turn in between. Repeat the process with the remaining escalopes.
Turn once more in egg and breadcrumbs. Heat 3 tablespoons of oil and fry 3 escalopes for about 5 minutes. Turn in between. Repeat the process with the remaining escalopes. Cut the schnitzels diagonally in half and arrange on plates with tomato sauce. Garnish with basil. Delicious with baguette bread