Tuna Casserole

4 1/2 cups egg noodles
1 can cream of mushroom soup
1/2 cup milk
1/2 tsp celery salt
2 cans tuna, drained
1/4 cup mayo
1 cup peas
1/4 cup grated cheese
1/2 cup potato chips

Boil noodles till tender. While noodles are cooking, mix soup, milk, mayo, salt and grated cheese in pan. Heat on low, stir. Add tuna, peas and boiled noodles. Season to taste. Top with chips and bake at 350F for 30 minutes.