Cheesy Tuna Noodle Hotdish

7 ounces tuna
1/2 cup mayo
1/3 cup chopped onion
1/2 cup milk
1 can cream of celery or mushroom soup
6-10 ounces egg noodles, boiled and drained * I use a whole package and add another can of soup. and a little more milk.*
1-1.2 cup shredded Colby or other favorite cheese
3/4 cup frozen peas.. optional

mix ingredients minus the noodles in a large bowl.. add cooked noodles ..pour into a greased casserole dish. You can top with crushed potato chips if you like or more cheese.
bake 350º F for 45min or until bubbly and heated through.
:)

I have to thank my aunt Bea for this recipe. It is one that we enjoy often.