1.Preheat Oven To 350 Degrees F (175 Degrees C). Bring A Large Pot Of Lightly Salted Water To A Boil. Add Pasta And Cook For 8 To 10 Minutes Or Until Al Dente; Drain. 2.In A 1 1/2 Quart Glass Casserole Dish, Layer Noodles, Butter Cubes, 2 Slices Of Cheese, 1/2 Of The Tuna, And 1/2 Of The Soup. Repeat The Layering With The Remaining Ingredients. Top The Casserole With Bread Crumbs. 3.Bake At 350 Degrees F (175 Degrees C) For 10 To 15 Minutes.