Chicken Noodle Casserole

Name: Chicken Noodle Casserole
Ingredients: 12 oz. wide egg noodles; 2 (10.5-oz.) cans cream of chicken soup; 1 c. whole milk; 1 c. shredded sharp cheddar cheese; 1 tsp. ground black pepper; 1/2 tsp. kosher salt; 3 c. cooked, shredded chicken (from 1 rotisserie chicken); 1/2 small yellow onion, finely chopped; 2 celery stalks, finely chopped; 1 (12-oz.) bag frozen peas and carrots, thawed; 1 1/2 c. coarsely crushed butter crackers (such as Ritz, about 1 cracker sleeve); 2 tbsp. unsalted butter, melted; Chopped parsley, to serve