Serendipity strikes...

Put some oil on a tinfoil square with the edges turned up, and put a bunch of spinach on it. Put a frozen swordfish filet on top, buttered on top and bottom. A sprinkle of hot pepper on top, into toaster oven @ 350F. After 15 mn flipped the fish, after another 10 put the fish on a plate and covered it with the spinach I had expected to be wilted, like every other time I have done this.

It wasn't.

It was crisp. It was crunchy. I have never encountered *crunchy* spinach. It was marvy. What did I do and can I do it again?