Let’s get cooking! Follow these steps to bring this delightful dish to life:

1. Preheat your oven to 400°F. Season the pork tenderloin generously with salt and pepper.
2. In a large oven-safe skillet, heat the olive oil over medium-high heat. Sear the tenderloin on all sides until golden brown, about 3-4 minutes per side.
3. Transfer the skillet to the preheated oven and roast the tenderloin for about 15 minutes, or until the internal temperature reaches 145°F.
4. Remove the pork from the oven and place it on a plate to rest. Cover loosely with foil to keep warm.
5. Using the same skillet, melt the butter over medium heat. Add the chopped onion and garlic, sautéing until the onion is translucent and fragrant.
6. Pour in the chicken broth, using a wooden spoon to scrape up any browned bits from the bottom of the skillet. Let it simmer for 2-3 minutes.
7. Stir in the heavy cream, Dijon mustard, and thyme. Allow the sauce to simmer until it thickens slightly, about 5 minutes.
8. Slice the rested pork tenderloin and return it to the skillet, spooning the sauce over top. Let it warm through for a minute or two.
9. Garnish with chopped parsley before serving, and enjoy!

Remember, the key is to embrace the process. Cooking, like life, is about the journey and not just the destination. So relish each step!