Rub veal steaks with salt and pepper. Heat oil and cook veal slices about 2 minutes on each side. Place veal in an ovenproof casserole. Add cored, sliced apples. Blend evaporated milk and yogurt together. Spread over apples. Place in a preheated 160ºC . oven; cook just until bubbly, about 20 to 30 minutes.