Use a pot holder or a silicone pan handle cover (that handle will be hot!) and place the skillet over a medium heat on the stove.
Melt down 4 tablespoons of butter, then add the minced shallot and cook for 3 minutes, stirring well.
6 tablespoon cold butter, ½ shallot
Add the pink peppercorns, minced herbs, both mustards, garlic, and cayenne pepper to the pan. Whisk well. You'll notice that it'll start to thicken up a bit, that's the mustard at work.
3 cloves garlic , 1 teaspoon pink peppercorns, ¼ teaspoon cayenne pepper, ½ tablespoon Dijon mustard, ½ tablespoon whole grain Dijon mustard, ½ teaspoon fresh rosemary leaves, ½ tablespoon fresh thyme leaves, 1 tablespoon fresh sage leaves
Splash in a little of the chicken broth and whisk well to get up the fond from the bottom of the pan and loosen up the brown bits from when the pork was cooking. Then add all of chicken broth and heavy cream, whisk well to incorporate them, and let reduce and thicken for about 8 minutes. Taste for seasoning and season with salt as needed.
⅓ cup heavy cream, 2 cups chicken broth, Salt and Pepper to taste
Once the sauce has thickened, whisk in the last 2 tablespoons of butter.
6 tablespoon cold butter
Slice the tenderloins into ½ inch slices, place nicely on a platter and serve with some of the mustard sauce poured over and the rest in a gravy boat or bowl.