1Empty Pasta mix into 3-quart saucepan 2/3 full of boiling water. Gently boil uncovered 15 minutes, stirring occasionally and adding corn during last 3 minutes of cooking.
2Drain pasta with corn; rinse with cold water. Shake to drain well.
3Meanwhile, in large bowl, stir together seasoning mix and milk until blended. Stir in mayonnaise. Stir in pasta with corn, chicken, tomato and onions. Refrigerate at least 1 hour.
4Serve with lime wedges. Cover; refrigerate any remaining salad.