Cook Time: 30 minutes (9 minutes to boil pasta, 15 minutes to bake)
Preheat the oven to 400 if you want to bake the casserole (this step is optional)
Prepare the Mac and cheese as directed on the package.
Drain the liquid from the tuna, and stir the tuna into the Mac and cheese.
Stir in the can of soup plus the 1/4 cup of milk. Add more milk if you like it a little thinner. You can just heat and serve,
or you may want to:
Grease an oven proof dish, and put the mixture in the dish. Top with some crumbs and butter and bake about 15 minutes.
Serve with a green vegetable such as green beans, broccoli or salad greens.