Cut 6 slices of bacon into 1 inch pieces and fry down. Remove from fat; add 1 cup sliced onion and cook until soft. Add bacon, 1 cup water, and 1 cup uncooked spaghetti. Cook until tender, 8-10 minutes. Add 1 can tomato soup. Season with pepper and salt as desired. Fold in 1/2 cup grated cheese, if you wish (optional). Garnish with parsley. Serves 6.