Prep: 5 minutes; Cook: 12 minutes; Cool: 5 minutes.
1. Grill corn, covered with grill lid, over medium-high heat (400°) 12 to 15 minutes or until browned on all sides, turning occasionally. Remove from grill; cool.
2. Cut corn from cob into a bowl; stir in lime zest and next 5 ingredients. Fold in avocado.