How to Make It
Preheat the oven to 350°F. Cook the pasta in a pot of boiling salted water until tender. Drain the pasta, then place back in the pot with the milk, butter and tuna fish and season with salt and pepper to taste.
Transfer to a buttered 2-quart baking dish. Top the pasta mixture with the cheese slices then bake in the oven until the cheese is melted, about 10 minutes. Serve.