Place Ground Beef In A Large, Deep Skillet. Cook Over Medium High Heat Until Evenly Brown. Drain Excess Fat. In A Slow Cooker, Combine Beef, Potatoes, Corn, Peas, And Barley. Stir In Tomato Sauce, Green Onions, And Chives. Season With Black Pepper. Cover And Cook On Low Setting For 4 Hours. Stir Occasionally, And Add Water If Necessary.