Spray grill with nonstick cooking spray. Heat grill to medium-high or 350 F. Heat oven to 350 F. Pat pepper slices dry and set aside. In a medium bowl, toss together squash, 1 tablespoon oil, salt, and pepper. Remove squash from bowl and place on grill. Cover with grill lid and grill 4 to 5 minutes on each side or until soft. Brush with 2 tablespoons oil. Bake for 2 minutes on each side or until toasted. Evenly top with sliced olives, roasted red pepper strips and grilled squash. Just before serving, sprinkle with chopped parsley.