It takes a lot of raw spinach to make a single serving so adjust this up, use a large skillet, and cook in batches if you need a lot.

Variation to try:  Sprinkle one side with brown sugar. We tried this with white sweet potatoes once and they did not turn out well at all.  Not sure what purple would do, but the standard orange ones are great when cooked this way.  Just make sure the rounds are all the same thickness.

This is a work in progress.

This recipe needs experimentation.