1 (12 oz.) pkg. med. pasta shells, cooked
1/2 stick butter
1 sm onion, chopped
1 c. frozen peas, thawed
1 can cream of chicken soup
1 c. milk
2 eggs, beaten
8 oz. American cheese (8 slices)
1 can fried onion rings
2 (6 oz.) cans tuna, drained

Pour cooked pasta into large casserole dish. Saute onion in butter until tender, add peas, soup, milk, tuna and eggs until heated through. Add cheese to hot mixture to melt. Pour over pasta. Cover and bake 30 minutes at 350 degrees. Uncover and top with fried onions and bake for 5 minutes more.