Wash the sage, dab dry and remove the leaves. Cut mozzarella into 8 slices. Wash the meat, dab dry. Cut open freezer bag. Place meat in between, pat thinner with a flat iron or pot bottom.
Season lightly with salt. Cover cutlets with 1 slice of ham and 1 slice of mozzarella cheese and 1 sage leaf. Roll up meat tightly. Fix with wooden skewers.
For the polenta, boil 1 l water. Dissolve the broth, pour in the polenta while stirring and bring to the boil again. Let it swell for 10-15 minutes at low heat, stirring from time to time. Grate the parmesan finely.
Stir in cheese and 40 g butter.
Heat 2 tablespoons of butter in a large frying pan. Fry the Involtini in it at medium heat while turning for about 10 minutes. Remove and fry the remaining sage leaves in the frying fat until crispy. Arrange Involtini with polenta and sage leaves.