- Preheat oven to 350 degrees. 
- Line baking sheet with aluminum foil. 
- In a small bowl, combine garlic, basil, oregano, thyme, parsley, and sage. Set aside. 
- Generously season meat with salt and pepper. 
- In a large pan, heat oil until shimmery. 
- Add to pan, and cook on all sides until dark golden brown. 
- Transfer to baking sheet. 
- Generously coat with herb mix. 
- Place pats of butter on top of the pork. 
- Wrap in foil, bake until meat is 145 degrees internally at the widest, thickest part of the tenderloin (about 45 minutes.) 
- When pork has come to temperature, remove and let rest, tented with foil, for at least five minutes to lock in juices. 
- Slice against the grain and serve immediately.