Directions

1. Place unhusked corn in a large container. Add cold water to cover; let stand 30 minutes.
2. Preheat grill to medium-high direct heat (350°F to 400°F). Coat grill rack with nonstick cooking spray. Remove corn from water (do not remove husks). Grill corn, covered, 10 minutes, turning occasionally. Remove from grill (do not turn grill off); cool corn slightly. Remove husks and silks.
3. Blend butter, 1 tablespoon of the oil, cumin, chili and salt in a small bowl. Place husked corn on grill; brush with butter mixture. Grill 4 to 7 minutes or until lightly charred, turning and basting once. Remove from grill; let cool slightly.
4. Cut kernels from cob and place in a medium bowl. Add olives, onions, cilantro, tomato, remaining 3 tablespoons oil, and vinegar; mix well. Serve warm or chilled.