Wash the chicken breast and pat dry with kitchen towel. Remove any bone or fat. Cut the whole breast into two and then cut each piece diagonally with a sharp knife thereby having 4 portions. Pound the chicken portions lightly on both sides. Prepare 4 oblong shaped aluminium foils 30 x 25 cm and grease them with butter. Place a portion of chicken over each foil. Season with salt and pepper and spread lightly with the mustard. Divide the Speck and Emmenthal into 4 amounts. Place slices of speck on each portion, some lemon juice and 1 teaspoon of the parsley. Place some grated Emmenthal. Carefully roll up the chicken tightly to enclose the stuffing. Roll it up tightly in the foil while keeping the seam of the foil at the top. Twist the sides of the foil upwards towards the seam. Prick the roll once with a skewer. Place the rolls in a baking pan. Pour some water in the dish to cover the base and place a few sprigs rosemary. Bake in a hot oven for 35 minutes. Bring out of oven and stand for 5 minutes. Meanwhile, prepare the vegetables. Wash and peel the carrots and cut into thin sticks. Heat the oil in a non-stick frying pan and lightly brown the carrots. Season with salt and pepper and pour over the Marsala. Cook gently for 12minutes or until the carrots are just done. Also, cut the tops of the zucchini and discard the caps. Use a teaspoon to remove most of the insides of the zucchini. Drop the zucchini in boiling salted water and cook until just soft. Drain and cool. Mash the potatoes with the butter and milk. Season and mix in the nutmeg, walnuts and Parmesan cheese. Stuff or pipe the mashed potato into the zucchini. Brush with the melted butter and bake in a moderate oven for 30 minutes. When you are ready to serve the meal, open up the foils over a warmed serving dish and arrange them with their gravy in a serving dish. Place on the zucchini Duchess and the Marsala carrots. Sprinkle over some chopped parsley and garnish with rosemary sprigs. Suggasted accompanying wine: DELICATA Pjazza Regina White I.G.T. Maltese Islands