CROCK POT BEEF & BROCCOLI - 2 lbs sirloin steak or boneless beef chuck roast, 1 C beef broth, 1/2 C low sodium soy sauce, 1/4 C brown sugar, 1 T sesame oil, 3 garlic cloves, 4 T cornstarch, 4 T water, 1 (12 oz) bag frozen broccoli florets, White rice cooked