Season the roulades with salt and pepper, spread a thin layer of mustard and top with the Parma ham. Clean the spring onions and cut each onion into 3-4 pieces of equal length. Cut the cheese into strips.
Cover the roulades with the onions and cheese and then roll them up. Fix the roulades with toothpicks and fry them on all sides in a pan in hot oil. Lower the temperature and cook on a moderate heat (level 4-5) in about 20 minutes.
If you like, you can add onions cut into strips to the pan.
If you want a sauce, you can also stew the roulades. To do this, add liquid (stock, wine, water) to the meat stock and cook for about 20 minutes. Thicken the meat stock with mixed cornstarch.