In a small bowl, mix together the minced garlic, rosemary, thyme, softened butter, Dijon mustard, and balsamic vinegar until well combined. Set aside.
Pat the beef tenderloin dry with paper towels. Rub the olive oil all over the tenderloin, then season generously with salt and black pepper.
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 spread the garlic herb butter mixture evenly over the top of the tenderloin.
Transfer the skillet to the preheated oven and roast for 20-25 minutes, or until the internal temperature reaches 130°F for medium-rare.
Remove the skillet from the oven and let the beef rest for 10 minutes before slicing.