Preheat oven to 400°F (200°C).
Pat pork dry and season with 1 tablespoon olive oil, salt, pepper, garlic powder, onion powder, smoked paprika, and thyme.
Heat an oven-safe skillet over medium-high heat and add a little olive oil. Sear pork 3 to 4 minutes per side until golden brown.
Transfer skillet to the oven and roast for 15 to 20 minutes, or until internal temperature reaches 145°F (63°C). Rest pork for 5 to 10 minutes before slicing.
Return skillet to medium heat and add olive oil or butter if needed. Sauté shallots for 2 to 3 minutes until softened.
Add garlic and cook for 30 seconds until fragrant.
Deglaze skillet with white wine or chicken broth, scraping browned bits, and simmer for 3 minutes.
Stir in heavy cream, Dijon mustard, and lemon juice. Simmer 5 to 7 minutes until sauce thickens. Season with salt and pepper.
Slice pork into medallions, drizzle with Dijon cream sauce, garnish with parsley, and serve immediately.