In 3 1/2 to 4-quart slow cooker, combine beef, mushrooms, onion, broth, teriyaki baste and glaze, sesame seed and sesame oil; mix well.
Cover; cook on Low setting 8 to 10 hours.
About 35 minutes before serving, cook rice in 1 1/3 cups water as directed on package. Meanwhile, in small bowl, combine 2 tablespoons water and cornstarch; blend well. Stir cornstarch mixture and broccoli into beef mixture. Cover; cook on Low setting 30 minutes longer or until broccoli is crisp-tender. Serve over rice.