For the brine: Rinse and pat the chops dry, slit a pocket into each chop about 3 to 4 inches long and as deep as the bone. Combine the remaining ingredients in a re-sealable bag, place in the refrigerator and brine for 1 to 2 hours.
For the stuffing: In a saute pan over medium-high heat, add the oil and butter, and when the butter melts and foams, add the pancetta and cook until crispy. Remove to a paper towel-lined plate, leaving the fat in the pan. Add the mushrooms, sprinkle with salt and pepper and cook over medium-high heat, stirring frequently for 6 minutes. Add the shallots, sage and 1/2 of the pancetta and cook for 3 minutes more. Remove to a plate to cool, spreading out evenly. Once cool, add the fontina cheese. Reserve the extra pancetta for service.
Remove the chops from the brine and pat dry. Stuff with the cooled filling and secure the opening with toothpicks. Reserve any remaining filling for the sauce.
Preheat the oven to 350 degrees F.
For the breading: In a shallow pan or bowl, add the Italian seasoning, pepper, panko and flour. Mix well. Add the eggs to a second shallow bowl and beat.
Dredge the chops through the egg, then lay in the breading and press to adhere. Repeat with all the chops.
In a large saute pan, add the oil and bacon fat and, when shimmering, add the pork chops, cooking until golden brown, about 5 minutes each side. Hold gently with tongs and cook the edges as well. Place on a baking pan fitted with a wire rack and place into the oven. Cook until the meat registers 135 degrees F on a thermometer, 10 to 15 minutes. Remove and lightly tent with foil.
For the sauce: In the same pan that the chops were cooked in, add the shallots and any remaining mushroom filling and cook over medium-high heat for 4 to 5 minutes. Deglaze the pan with the stock and scrape any bits from the bottom. Whisk in the mustard and yogurt until well combined, and then add the lemon juice and salt.
Remove the chops from the baking pan, remove the toothpicks and place on a serving platter. Top with the sauce. Garnish with the parsley and the remaining pancetta and serve immediately.
Sauvignon Blanc makes a nice pairing for this dish.