Slice the Murazzano cheese into strips. Make an incision in the chicken breasts lengthwise so as to create a pocket. Salt and pepper the inside of the pockets. Stuff each pocket with half a slice of ham, a strip of Murazzano cheese, and some of the steamed spinach. Close the pockets with a toothpick and then roll them lightly in the flour.
Heat the oil and butter in a pan with the sage leaves and the garlic (which should be removed after a few minutes). Brown the chicken breasts on both sides, then add salt and the white wine. When the wine has evaporated pour in the chicken broth.
Cover with a lid and simmer at a very low flame for 15-20 minutes. Turn occasionally and add more broth if necessary. The stuffed chicken breasts can also be cooked in a preheated oven at 450°F, for 15-20 minutes.
Serves 4