Rub salt, pepper, and dried thyme into the tenderloin- in your preferred amounts. Set aside.
1- 1 1/2 lb pork tenderloin, salt, pepper, & dried thyme
Add the chicken broth and cornstarch to a medium sized mixing bowl, whisking until evenly combined & the mixture's smooth. Stir in the mushroom soup, onion soup seasoning ,and apple cider until evenly combined. Set aside.
1 14.5 oz can chicken broth, 2 tbsp cornstarch, 1 10.5 oz can cream of mushroom soup, 1 1 oz pkt dry onion soup seasoning, 1/2 cup apple cider
Add the olive oil to a dutch oven, and heat over medium high. When the oil's hot, sear the tenderloin on all sides. Watch it carefully to ensure it's seared, not burned.
2 tbsp olive oil
When every side has a nice crisp, brown sear on it- pour the soup mixture into the pot over top of the pork.
Transfer the dutch oven to an oven heated to 425 degrees, and bake for 22-25 minutes, or until cooked through.
Remove the dutch oven from the oven. Transfer the tenderloin to a baking dish, loosely cover with foil, and let it rest for 10 minutes.
Whisk the gravy in the dutch oven to combine, and serve drizzled over slices of the tenderloin.