Meanwhile, heat oil in 12-inch skillet over medium heat. Add green onions, broccoli, celery, red pepper, coleslaw mix, salt and pepper. Cook 8 to 10 minutes, stirring frequently, until cabbage is wilted and vegetables are crisp-tender. Add chicken and cashews, cook an additional minute. Spread vegetable-chicken mixture evenly over partially baked crust. Top with mozzarella cheese.