This was delicious!
The recipe for this delicious seasonal meal last night was found here at the Food Network website: http://www.foodnetwork.com/recipes/aida-mollenkamp/pork-tenderloin-with-apple-cider-reduction-recipe.html.
The only thing I did differently was that I added apple slices (from one Gala apple and one Granny Smith apple because it's what I had) to the reduction during the last few minutes, just enough to soften the apple slices a little. They were a nice touch!
Baby spinach made a nice side dish. The sauce in the recipe turned out thin but it made a nice dressing for the baby spinach. I served the pork and apples over the spinach and the heat from the pork, apples, and sauce wilted some leaves a little, some stayed crunchy. Just perfect. Although, I didn't think there was enough sauce for three of us. Next time, I'd reduce the sauce less (or make more?) so there'd be more sauce to dress the spinach and pork.