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Keto Garlic Herb Pork Tenderloin - Simple, Juicy, And Flavor-Packed

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Prep Time 10 minutes
Cook Time 25 minutes
Total Time 35 minutes
Servings: 6 servings
Ingredients Method

Ingredients
  

  • 1 pork tenderloin (about 1 to 1.5 pounds), silver skin trimmed
  • 2 tablespoons olive oil, divided
  • 4 cloves garlic, finely minced
  • 1 tablespoon fresh rosemary, finely chopped (or 1 teaspoon dried)
  • 1 tablespoon fresh thyme leaves, chopped (or 1 teaspoon dried)
  • 1 teaspoon onion powder
  • 1 teaspoon kosher salt (more to taste)
  • 1/2 teaspoon black pepper
  • 1 teaspoon lemon zest
  • 1 tablespoon lemon juice
  • 1 tablespoon Dijon mustard (check label for no added sugar)
  • 1 tablespoon unsalted butter (optional for pan sauce)
  • 1/3 cup chicken broth or bone broth (optional for pan sauce)

Method
 

  1. Preheat and prep: Set your oven to 400°F (200°C). Pat the pork tenderloin very dry with paper towels. Dry surface = better sear and better crust.
  2. Make the garlic herb rub: In a small bowl, mix 1 tablespoon olive oil, minced garlic, rosemary, thyme, onion powder, salt, pepper, lemon zest, and Dijon mustard.
  3. Season the pork: Rub the mixture all over the tenderloin, pressing gently so it adheres. Let it sit for 10 minutes while the oven heats. This short rest helps the flavors stick and the meat temper.
  4. Sear on the stove: Heat a large oven-safe skillet over medium-high and add the remaining 1 tablespoon olive oil. Sear the tenderloin 1–2 minutes per side until lightly browned all over. Don’t cook it through yet; you’re just building color and flavor.
  5. Roast to finish: Transfer the skillet to the oven. Roast for 12–18 minutes, depending on thickness, until the internal temperature reaches 140–145°F (60–63°C) in the thickest part.
  6. Rest the meat: Move the tenderloin to a cutting board and tent loosely with foil. Rest for 8–10 minutes. This keeps it juicy and lets the temperature even out.
  7. Optional pan sauce: Return the skillet to medium heat on the stove. Add broth and lemon juice, scraping up browned bits. Simmer 2–3 minutes to reduce slightly, then stir in butter until glossy. Taste and adjust salt and pepper.
  8. Slice and serve: Cut the tenderloin into 1/2-inch medallions. Spoon the pan sauce over the top and serve with your favorite low-carb sides.