For the beef: Put the tenderloin in a medium bowl and add the thyme, salt, garlic, and pepper. Let marinate in the refrigerator for 1 hour.
Preheat the grill (gas or charcoal is fine) to 500 degrees F.
Once hot, put the tenderloin on the grill and cook for 5 to 8 minutes per side. Stick in a Dutch oven and add the veggie stock. Let simmer for 15 minutes.
For the chimichurri sauce: Add the tarragon, oregano, sage, olive oil, lemon juice, roasted garlic, and sea salt into a blender and blend until completely mixed. Spoon sauce over the tenderloin and serve.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.