1. Sauté chicken in margarine for five minutes or until tender.
2. Cut thin slice off tops of tomatoes. Scoop out pulp, leaving shells intact.
3. Dice tomato tops and pulp. Drain.
4. Combine all ingredients except tomato shells. Mix well.
5. Spoon mixture into shells. Place into shallow baking pan.
6. Place into shallow baking pan.
7. Bake at 350 degrees Fahrenheit for 45 minutes.