Melt ¼ cup Challenge Garlic Parmesan with Herbs Butter Snack Spread in the microwave for 20 seconds. Pour into a large bowl and whisk in lemon juice, olive oil, salt and black pepper.
Add chicken thighs and toss to coat. Marinate at room temperature for 30 minutes.
Preheat grill to medium-high heat. When hot, lightly oil grates. Remove chicken from marinade, shaking off excess, and place on grates. Grill, flipping 2-3 times, until edges begin to char and an instant-read thermometer registers 165°F when inserted into the thickest part of the meat, 10-12 minutes.
Transfer chicken to a platter. Spread with remaining Garlic Parmesan with Herbs Butter Snack Spread and sprinkle with olives and parsley. Serve with lemon wedges.