1. Preheat grill to medium-high heat.
2. Cut a lengthwise slit down the center of the tenderloin two-thirds of the way through the meat. Open halves, laying tenderloin flat. Place tenderloin between 2 sheets of plastic wrap; pound to 1/2-inch thickness using a meat mallet or heavy skillet. Spread mustard evenly over pork. Sprinkle with cilantro. Arrange cheese and pickles over pork in a single layer. Roll up, starting with long side; secure pork at 1-inch intervals with twine. Sprinkle evenly with salt and pepper.
3. Place the pork on a grill rack coated with cooking spray. Grill 22 minutes or until a thermometer registers 155°, turning after 11 minutes. Remove from grill. Let stand, covered, for 5 minutes. Cut into 12 slices.
Wine Match: A dry, medium-weight rosé, like Crios de Susana Balbo Rose of Malbec, Argentina ($12), has enough crisp acidity to match the stuffed pork's sweet-tart pickles and tangy Dijon mustard (two ingredients that would put the kibosh on most reds) yet just a smidgen of tannins to tango with the melted Swiss cheese. --Scott Jones