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Keto Dinner

Pork Tenderloin Diane

This keto pork tenderloin Diane brings a restaurant-style meal to your table with minimal effort. The tender medallions sear quickly, then finish in a tangy lemon-mustard sauce that feels indulgent yet keeps carbs in check. I often turn to this recipe on busy evenings when I want something special without complicated prep.

15 min Prep time 20 min Cook time 35 min Total time 4 Servings 310 Calories
Pork Tenderloin Diane

Ingredients

  • whole pork tenderloin (about 1 1/4 pounds), sliced into 8 rounds
  • teaspoons lemon pepper
  • tablespoon butter
  • tablespoon lemon juice
  • tablespoon Worcestershire sauce
  • teaspoon Dijon mustard
  • tablespoon minced fresh parsley

Instructions

  1. Step 1

    I like to start by placing each pork slice between two sheets of plastic wrap. Gently pound them to an even thickness—this ensures quick, uniform cooking. Season both sides with lemon pepper while the butter melts in a heavy skillet over medium-high heat. Once the butter foams, carefully lay the medallions in the pan without crowding. Let them sear undisturbed for 2–3 minutes per side until golden brown and just cooked through. Use tongs to transfer the pork to a warm serving platter and tent loosely with foil. Into the same skillet pour the lemon juice, Worcestershire sauce, and Dijon mustard, scraping up any browned bits with a wooden spoon. Simmer for a minute or two until the sauce reduces slightly and coats the back of a spoon. Spoon the glossy sauce over the medallions, scatter with fresh parsley, and serve right away.

Chef's Tip

I find that letting the pork rest for a minute after searing keeps it supremely juicy. Also, deglaze the pan with a splash of broth if the sauce gets too thick.

Storage Tips

Store leftover medallions in an airtight container in the fridge for up to 3 days. Reheat gently in a skillet over low heat to keep the meat tender, adding a splash of water to refresh the sauce.

Variation Tips

Serve with cauliflower mash or roasted broccoli to keep it keto. For a different twist, swap Dijon for whole-grain mustard and add a pinch of smoked paprika to the lemon pepper.

Frequently Asked Questions