In a 10" skillet melt butter until sizzling. Add broccoli and onion. Cook
over med. heat, stirring occasionally, until crisply tender (5-6 minutes).
In medium bowl stir remaining ingredients
except steak, tomatoes and rice.
Add sirloin strips to marinade;
let stand 5 min.
Add sirloin and marinade to vegetable
mixture. Continue cooking, stirring occasionally, until meat is browned (6-8 minutes). Stir in tomatoes. Cover; let stand
2 minutes or until heated through. Serve meat and vegetables with juice over rice.