Preheat oven to 350°F. Brush chicken breasts with olive oil and Mrs. Dash® Original Blend. Set aside. Add onions and garlic to an 8-9 inch skillet. Top vegetables with chicken, smooth side down. Cover lightly with foil and place in oven. Cook 15 minutes. Increase heat to 375°F. Uncover skillet and turn chicken. Cook 10 minutes. Remove and cover lightly with foil. Rest 5 minutes before serving.