In A Slow Cooker, Mix The Broth, Button Mushrooms, Shiitake Mushrooms, Barley, Lentils, Onion Flakes, Garlic, Savory, Bay Leaves, Basil, Pepper, And Salt. Cover, And Cook 4 To 6 Hours On High Or 10 To 12 Hours On Low. Remove Bay Leaves Before Serving.