Add remaining 1 teaspoon oil to wok; rotate wok. Add squash; stir-fry 1 minute. Add broth; reduce heat to low. Cover and cook about 3 minutes or until squash is tender. Stir in cornstarch mixture, pea pods and beef. Stir-fry over high heat about 2 minutes or until pea pods are crisp-tender. Serve over rice.