PREP: 20 minutes COOK: 5 to 51⁄2 hours (low) or 21⁄2 to 3 hours (high) MAKES 6 servings 1 cup regular barley 2⁄3 cup wheat berries 2 14-ounce cans vegetable broth 1 cup frozen whole kernel corn 1 4-ounce can (drained weight) sliced mushrooms, drained 1⁄2 cup thinly...
