Heat the oven to 425 degrees and line a large baking sheet with parchment or foil.
Stir together 2 tablespoons olive oil, the chopped herbs, minced garlic, salt, and pepper in a small bowl.
Rub the herb mixture evenly over the pork tenderloin.
Toss the apple slices and potato halves with the remaining 1 tablespoon olive oil and a light sprinkle of salt and pepper.
Place the pork on the baking sheet and arrange the apples and potatoes around it in a single layer.
Roast for 25 to 30 minutes until the pork reaches 145 degrees in the center and the potatoes are tender and browned.
Rest the pork for 5 minutes before slicing and serving with the roasted apples and potatoes.