Preheat oven to 400°F (200°C).
Mix olive oil, garlic, herbs, Dijon mustard, salt, and pepper in a small bowl.
Rub the herb mixture all over the pork tenderloin.
Heat vegetable oil in an oven-safe skillet over medium-high heat.
Sear the pork for 2-3 minutes on each side until browned.
Transfer the skillet with the pork to the preheated oven.
Roast for 20-25 minutes or until internal temperature reaches 145°F (63°C).
Let rest for 5 minutes before slicing and serving.