Shrimp Casserole

4 ounces noodles, cooked
3/4 cup milk
1/2 cup mayonnaise
1 tablespoon scallions, chopped
1 cup canned shrimp (or more)
1/3 cup Cheddar cheese, shredded
1 can cream of shrimp soup
1/4 cup celery, diced
1 teaspoon salt
1/4 cup chow mein noodles

Combine all ingredients except chow mein noodles and bake at 350 degrees F for 25 minutes. Top with chow mein noodles and bake 10 minutes longer.