Tuna Sauce

We brought some dried spaghetti back from our last trip to Italy -- Pasta Di Semola Di Grano Duro. I made tuna sauce to go over it.

I sautéed sliced yellow onion in olive oil, threw in tomato purée with salt a freshly ground black pepper, then mixed in canned tuna. The tuna was water-packed, but I wish I had olive oil-packed. I also wish I had capers. I splashed in some pasta water, too, then the pasta, and mixed in some grated parmigiano cheese and splashed a few dropped of olive oil on top. Delicious.