There are a few different ways to cut the medallions of pork. If you have a very thick tenderloin, you can cut one six ounce piece, turn it on its side, flatten it a bit and that is what you will use. If however your tenderloin is thin, as most are that are sold in the supermarket, when you cut your six ounce piece, you can butterfly it by cutting halfway through in the center and opening it up like a butterfly to have one single six ounce piece. If this proves too difficult, you can just cut three ounce thick slices from the tenderloin and serve two to a portion. The cooking time will be less for a smaller medallion.
- 1 ½ pounds pork tenderloin (buy the thickest tenderloins you can find. You may need two tenderloins to get four thick cuts)
- ½ teaspoon salt
- ½ teaspoon freshly ground black pepper
- 4 tablespoons butter, divided
- 2 tablespoons flour
- 1 cup beef stock
- 1 cup chicken stock
- 3 tablespoons dry white wine
- 2 tablespoons white wine vinegar
- 2 tablespoon minced garlic
- ½ cup minced shallots
- 4 large bay leaves
- 2 tablespoons extra virgin olive oil
- 8 paper-thin slices of prosciutto
- Lay your prepared medallions out on a plate and sprinkle both sides with the salt and pepper. Allow to sit at room temperature for 30 minutes while you prepare the sauce.
- In a medium to large sauce pan, melt 2 tablespoons of the butter with the flour and cook over medium- low heat for about four minutes. Add both stocks and stir with a wire whisk to smooth out. Add wine, vinegar, garlic, shallots and bay leaves. Bring to a boil then reduce heat to a simmer. Cook uncovered for 20 minutes, stirring occasionally. After 20 minutes, stir in the last two tablespoons of butter and then remove from heat and set aside.
- Preheat oven to 350 degrees.
- Heat a cast iron skillet or heavy bottomed oven-proof pan with the olive oil to scorching hot. When the oil starts to ripple from the heat, place the pork medallions in with long handled tongs, being careful not to burn yourself. Sear on one side for about two minutes, flip and sear for 30 seconds. Add the sauce into the pan with the pork (again being careful since the sauce will bubble up). Lay two slices of prosciutto over each medallion, spoon a little sauce over each and then place the pan in the oven. Bake for about five minutes, then remove the pan from the oven and place a probe thermometer into the thickest medallion. If the temperature of the pork reads 140 degrees or higher, remove the pan from the oven and proceed to the next step. If not, put the pan back in the oven for another five minutes. (Depending on how thick your medallions are and how you like your pork cooked, this step will vary. We like our pork slightly pink but some people don’t, so your choice.)
- Remove the bay leaves and discard. To serve, divide into four serving plates and spoon sauce from the pan over each portion.