These are a surprise! And very good, too. I did a double-take when I saw the title of the recipe. On reading it, however, I decided they were more like crustless quiches than muffins. To me, quiches with tuna sound more appetizing, somehow. They are easy to make. I made one third of the recipe here and fillied 12 paper-lined muffin cups, that hold a little more than 1/4 cup each. If I had filled them to the top, I would have gotten 11, but spread things out a little, and got 12. I baked them at 190 degrees (I started at the recipe's 200 degrees, but the tops seemed to be browning too quickly,) for about 20 minutes. They came out of the papers very easily, and are very tasty with the sweet chili sauce. Thank you very much for sharing this interesting recipe with us. Oh, I didn't have quite enough tuna, so made up the difference with crab. That was the only change I made.