– 6 oz egg noodle, cooked – 1 cup frozen peas – 2 cans tuna drained, 5 oz each – 10.5 ounce can cream of mushroom soup – 1.5 cups shredded mozzarella cheese, divided – ½ tsp celery salt – ¼ tsp pepper – 2 tbsp fresh parsley, chopped  – ¼ cup bread crumbs – 2 tbsp butter, melted