Preheat Oven To 350 Degrees F (175 Degrees C). In A Medium Bowl, Combine The Cream Cheese, Crushed Crackers, Walnuts, Eggs, Finely Chopped Onion, Sage And Salt. Mix Well. Heat Oil In A Medium Skillet Over Medium High Heat. Drop Cheese Mixture By Rounded Tablespoonfuls Into The Hot Pan. Flatten With A Spatula And Let Brown. Turn And Brown Other Side. Place Cooked Patties In A 8X12 Inch Baking Dish. Combine The Soup, Milk And Sour Cream And Mix Well. Pour Over Patties. Bake At 350 Degrees F (175 Degrees C) For 20 Minutes Or Until Bubbly.