If your guests are great eaters, consider a knuckle of pork per person, otherwise just one for two people. Then you need plenty of sage and rosemary, garlic, salt, black pepper and a good dry white wine (at least a liter) and olive oil.
Finely chop sage, rosemary and garlic and mix with plenty of salt and pepper. Spread this mixture onto a sheet of baking paper and roll the knuckles over it. Let rest in refrigerator for at least 12 hours to season. Then put them in the baking pan with a little oil and bake at 200 degrees for about 30-40 minutes, being careful to turn to brown on all sides, add white wine and cover with aluminum foil and bake at 200 degrees for about 1 hour and a half. Remove the aluminum foil and finish cooking for another 20-25 minutes.