[Questions drive the conversation onwards!] Tuna casserole is canned tuna... it's a kind of fish... combined with noodles, and milk, and vegetables, and cheese, and it's baked, and it's very nice! So I guess that makes it four things... but I like to add sour cream, too. It makes it taste nicer.

And yes! That's bacon! ...or maybe ham? I hear that it's all from the same animal....