1 1/2 c. broken noodles
1 c. tuna, drained
1/2 c. crushed potato chips
1 c. mushroom soup
1 c. grated cheese
1/2 c. evaporated milk
1/3 c. chopped onion

Cook noodles in unsalted water, drain. Mix noodles with soup, milk, tuna, cheese and onion. Pour into greased 1 1/2 quart casserole. Top with potato chips. Bake at 425 degrees for 15 minutes.