1. Lightly brown meat in butter in large skillet. Season with 1 tsp. Salt and the pepper.
2. Thinly slice onion and green pepper and add to skillet. Stir in minute rice right from box. 3. Saute over high heat until rice is lightly browned. Add tomatoes, mustard and remaining salt. Mix well. 4. Bring to a boil. Reduce heat and let simmer 5 minutes uncovered.