Preheat oven to 425° F.
Lay the pork tenderloin on a flat work surface and carefully butterfly by cutting lengthwise along the side but not all the way through the tenderloin. Open the tenderloin like a book and cover with a layer of plastic wrap. Using a mallet or heavy skillet, pound the tenderloin until approximately 1/2-inch thick.
Season the tenderloin with salt and pepper. Sprinkle the cheese evenly over the roast and then layer the pears on top of the cheese. Top the cheese with the spinach.
Roll the tenderloin up lengthwise and then tie with kitchen twine. Transfer to a baking sheet lined with foil. Pour the Country Cranberry Relish over the pork to coat and transfer to the oven.
Roast the tenderloin for 30-35 minutes or until cooked through (Internal temperature should be between 145° and 160° F.)
Remove the tenderloin from the oven and allow to rest for 10-15 minutes covered with foil.
Slice the tenderloin into 1-inch pieces. Serve immediately.
