Ingredients
1tbspolive oil,divided
½medium onion,chopped
3garlic cloves,chopped
¼cupfresh parsley,chopped
1tbspdijon mustard
1pinchsalt and ground black pepper,to taste
1lbpork tenderloin
8ozdeli ham
1cupGruyere cheese,grated
Preparation
Preheat the oven to 375 degrees F.
Heat ½ tablespoon oil an oven-proof pan large enough to fit the tenderloin over medium-high heat. Add the onion and garlic, then sauté for about 5 minutes until just starting to brown.
Remove from heat and stir in parsley and mustard. Transfer to a bowl and season with pepper.
Place the tenderloin on a flat work surface. Slice horizontally through the middle, being careful not to cut all the way through to the other side. Open the 2 sides and spread them out like an open book.
Place the pork between 2 sheets of heavy plastic on a solid, level surface. Firmly pound with the smooth side of a meat mallet to a ½-inch thickness. Trim any extra pieces so the tenderloin is rectangular.
Chop the pork trimmings finely and add to the onion mixture. Spread onion mixture onto pork.
Lay the ham slices over it and sprinkle Gruyere cheese on top. Roll tenderloin up along the long side. Tie with cotton kitchen string. Season with salt and pepper.
Heat the remaining oil in the same pan over medium-high heat. Sear the tenderloin in the hot oil for 3 to 5 minutes per side, until browned.
Transfer pan to the preheated oven and bake for 25 to 30 minutes, until an instant-read thermometer inserted into the center of the tenderloin reads 145 degrees F.
Let rest for 5 minutes before slicing.
Serve and enjoy!
