Preheat your oven to 425°F.
In a small bowl, mix together the salt, black pepper, garlic powder, rosemary, and thyme.
Rub the beef tenderloin with olive oil, then coat it evenly with the herb mixture.
Heat a large oven-safe skillet over medium-high heat. Once hot, sear the beef tenderloin on all sides until browned, about 2-3 minutes per side.
Remove the skillet from heat and brush the tenderloin with Dijon mustard and balsamic vinegar.
Transfer the skillet to the preheated oven and roast for 20-25 minutes, or until the internal temperature reaches 135°F for medium-rare.
Remove the skillet from the oven and let the beef rest for 10-15 minutes before slicing.