Strip off rosemary needles, chop finely and fry briefly (approx. 1 minute) in 2 tablespoons of olive oil. Allow to cool and mix with the cheese to form a paste. Lightly season the schnitzel with salt and pepper and coat with the cheese paste. Wrap the ham slices crosswise around the schnitzel.
Heat the remaining oil in a non-stick pan and gently fry the schnitzel in it.