Heat oil in a large skillet over medium-high heat. Season both sides of the pork chops with 1 teaspoon of the creole seasoning, or more if desired.
Once the skillet is hot, sear the chops 5-6 minutes per side or until it reaches an internal temperature of 145℉. If desired, for the final minute of cook time, sear on the fat cap side of the pork chop. Transfer the chops to a plate and set aside. Turn down the heat to medium.
Once cooled, add the onion or shallot and sauté 1 minute. Add garlic and sauté another minute.
Whisk in chicken broth, scraping up any solid bits from the bottom of the pan, and allow the mixture to simmer 5 minutes. This will give it time to reduce and thicken.
To the broth, add dijon mustard and lemon juice, followed by the heavy cream and remaining creole seasoning. Simmer 1 minute, then turn off the heat.
Serve pork chops with the sauce ladled on top.