Tuna in the Straw Casserole

1 can (10-3/4 ounces) condensed cream of mushroom soup, undiluted

1 can (5 ounces) evaporated milk

1 can (6 ounces) tuna, drained and flaked

1 can (4 ounces) mushroom stems and pieces, drained

1 cup frozen mixed vegetables

2 cups potato sticks, divided

In a large bowl, combine soup and milk until blended. Stir in the tuna, mushrooms, vegetables and 1-1/2 cups potato sticks. Transfer to a greased 1-1/2 quart baking dish. Bake, uncovered, at 375 degrees for 20 minutes. Sprinkle with the remaining potatoes. Bake 5-10 minutes longer or until bubbly and potatoes are crisp.