Brown beef cubes in small amount of vegetable oil. At same time, cook sausage for 5 minutes, to remove some fat. Cut sausage into small pieces and add to beef. Add can of tomatoes until bubbly. Pour in wine, cooking to boil off alcohol (about 5 minutes). Sprinkle soup mix; stir well and cook slowly until meat is tender. (If using pressure cooker, cook on high for 15 minutes and let cool down.) Add green beans and let cook for 7 to 8 minutes. Add cooked shells; mix well. Cover and let stand before serving; leftovers gain flavor.