Preheat a charcoal or gas grill for direct cooking over medium heat (350°).
2
Combine olive oil and crushed red pepper in a large bowl. Add drained olives; toss to coat. Cut a 16x16-inch sheet of heavy foil. Place olive mixture in center of foil; roll or fold up edges of foil to form a side around the olive mixture, leaving top open.
3
Grill 12 to 18 minutes, stirring every 3 to 5 minutes or until olives reach desired doneness. Remove from grill; garnish with fresh Italian parsley, if desired.