Preheat your oven to 375°F (190°C).
Pat the pork loin roast dry with paper towels.
Rub the olive oil all over the pork loin.
In a bowl, mix garlic, rosemary, thyme, salt, and pepper.
Spread the herb mixture evenly over the pork.
Heat a skillet over medium-high heat and sear the pork on all sides until browned.
Transfer the pork to a roasting pan.
Mix chicken broth, Dijon mustard, and balsamic vinegar; pour over the pork.
Roast in the oven for 1 hour or until internal temperature reaches 145°F (63°C).
Let the roast rest for 10-15 minutes before slicing.