Cook rotini according to package directions. Rinse in cool water. Mix rotini and all ingredients except tomatoes and avocados in a plastic container. Put in refrigerator for 12 hours or more and stir 3 or 4 times if possible. When ready to serve, add 2 chopped tomatoes and some avocados. Garnish with other tomato and remaining avocados.
Cajun Country -- New Iberia, Louisiana