(*) They must be red onions: the brown onions are too spicy for this roast.
Fry the veal roast in olive oil and keep it warm. Cut the onion into small rings and steam them well in the frying pan. Put the roast back into the pan, season with salt and pepper, pour the white wine over it and let it simmer for about 120 minutes.
When the onion sauce is creamy, remove the roast and cut it into slices. The best way to serve it is to arrange the roast pieces on the onion sauce in plates.