This recipe is for the nights when you want something impressive without the fuss. Tender pork filled with garlicky spinach and creamy feta tastes restaurant-worthy, but it’s simple enough for a weeknight. It’s also keto-friendly, low-carb, and packed with protein.
Jump to RecipeYou’ll get big flavor from everyday ingredients and just one pan. If you’re short on time but want a meal that feels special, this one’s a keeper.
Why This Recipe Works
- Quick technique: Butterflying the pork tenderloin creates a flat surface that cooks fast and evenly, cutting the total cook time to about 25 minutes.
- Bold, simple flavors: Garlic, lemon zest, feta, and spinach bring freshness and richness without complicated steps.
- Keto-friendly balance: The pork and cheese add satisfying fat and protein, while the spinach keeps it light and low-carb.
- One-pan efficiency: A quick sear and oven finish save time and cleanup.
- Moist, tender results: A short roast and brief rest keep the pork juicy and easy to slice.
Ingredients
- 1 pork tenderloin (about 1 to 1.25 pounds)
- 1 tablespoon olive oil, plus more if needed
- 2 cups fresh spinach, roughly chopped
- 2 cloves garlic, minced
- 1/2 cup crumbled feta cheese
- 1 teaspoon lemon zest
- 1 tablespoon fresh parsley, chopped (optional)
- 1/2 teaspoon dried oregano (or 1 teaspoon fresh, chopped)
- 1/4 teaspoon red pepper flakes (optional, for heat)
- Salt and black pepper, to taste
- Kitchen twine or toothpicks, for securing
- Lemon wedges, for serving (optional)
How to Make It
- Preheat the oven: Set your oven to 400°F (200°C). Have an oven-safe skillet ready.
- Butterfly the tenderloin: Place the pork on a cutting board.Using a sharp knife, slice lengthwise down the center, stopping about 1/2 inch from the bottom so it opens like a book. Gently pound to an even 1/2-inch thickness with a meat mallet or the bottom of a pan.
- Season the pork: Pat dry and season the inside and outside with salt, pepper, and half the oregano.
- Sauté the spinach: Heat 1 teaspoon olive oil in the skillet over medium heat. Add garlic and cook 30 seconds until fragrant.Add spinach and a pinch of salt, and sauté 1–2 minutes until wilted. Transfer to a bowl and cool slightly.
- Make the filling: Stir feta, lemon zest, parsley (if using), remaining oregano, and red pepper flakes into the spinach. Taste and adjust salt and pepper.The feta is salty, so go easy on extra salt.
- Fill and roll: Spread the filling evenly over the butterflied pork, leaving a 1/2-inch border. Roll the pork tightly from one long side to the other. Secure with kitchen twine every 2 inches or use toothpicks.
- Sear the pork: Wipe out the skillet if needed and add remaining olive oil.Heat over medium-high until shimmering. Sear the pork 1–2 minutes per side until lightly browned all over.
- Roast: Transfer the skillet to the oven. Roast 10–14 minutes, or until the thickest part reaches 140–145°F (60–63°C) on an instant-read thermometer.
- Rest: Move the pork to a cutting board and rest 5 minutes.This keeps the juices in and makes cleaner slices.
- Slice and serve: Remove the twine or toothpicks. Slice into 1-inch rounds. Finish with a squeeze of lemon and cracked pepper.Serve with a simple salad or roasted vegetables.
Keto Spinach and Feta Stuffed Pork Tenderloin
Juicy pork tenderloin stuffed with garlicky spinach and creamy feta
CuisineMediterranean
CourseMain Course
DifficultyMedium
Servings4
Prep Time15 min
Cook Time10 min
Total Time25 min
Calories~300–420 kcal per serving
For the Pork
- 1 pork tenderloin (about 1 to 1.25 lb)
- 1 tbsp olive oil, plus more if needed
- Salt, to taste
- Black pepper, to taste
For the Filling
- 2 cups fresh spinach, roughly chopped
- 2 cloves garlic, minced
- 1/2 cup crumbled feta cheese
- 1 tsp lemon zest
- 1 tbsp fresh parsley, chopped, optional
- 1/2 tsp dried oregano or 1 tsp fresh oregano, chopped
- 1/4 tsp red pepper flakes, optional
For Serving
- Lemon wedges, optional
Tools
- Kitchen twine or toothpicks
Instructions
- Preheat the OvenPreheat the oven to 400°F (200°C) and have an oven-safe skillet ready.A skillet that can move from stovetop to oven makes this recipe faster.
- Butterfly the TenderloinSlice the pork lengthwise down the center, stopping about 1/2 inch from the bottom so it opens like a book. Gently pound it to an even 1/2-inch thickness.An even thickness helps the pork cook quickly and evenly.
- Season the PorkPat the pork dry and season the inside and outside with salt, pepper, and half of the oregano.Season both sides well so the pork tastes flavorful throughout.
- Sauté the SpinachHeat 1 teaspoon of the olive oil in the skillet over medium heat. Add the garlic and cook for 30 seconds until fragrant, then add the spinach and a pinch of salt. Sauté until wilted, about 1 to 2 minutes, and transfer to a bowl.Let the spinach cool slightly before mixing in the cheese.
- Make the FillingStir the feta, lemon zest, parsley if using, remaining oregano, and red pepper flakes if using into the spinach. Taste and adjust the seasoning.Go easy on added salt because feta is already salty.
- Fill and RollSpread the filling evenly over the butterflied pork, leaving a 1/2-inch border. Roll the pork tightly and secure it with kitchen twine or toothpicks.Do not overfill or the filling may spill out during cooking.
- Sear the PorkWipe out the skillet if needed and add the remaining olive oil. Heat over medium-high until shimmering, then sear the pork for 1 to 2 minutes per side until lightly browned.Searing adds flavor and helps keep the roll sealed.
- RoastTransfer the skillet to the oven and roast for 10 to 14 minutes, or until the thickest part reaches 140 to 145°F (60 to 63°C).Use an instant-read thermometer so the pork stays juicy.
- Rest and ServeMove the pork to a cutting board and rest for 5 minutes before removing the twine or toothpicks and slicing into rounds. Finish with lemon and cracked pepper if desired.Resting helps the juices stay in the meat.
Tips for the Best Results
- Do not overfill the pork or the filling may leak out.
- Always sear before roasting for better flavor and color.
- Use a thermometer and remove the pork at 140 to 145°F.
- Let the pork rest before slicing so it stays juicy.
- Taste the filling before stuffing and adjust salt carefully.
- Spinach should be wilted and cooled slightly before adding the feta.
- Kitchen twine helps the roll hold its shape during cooking.
- A squeeze of lemon at the end brightens the whole dish.
~300–420 kcal per serving · Low-Carb · High-Protein · Savory Dinner
How to Store
- Refrigerate: Store leftovers in an airtight container for up to 3 days. Let it cool to room temperature before sealing.
- Reheat: Warm slices gently in a covered skillet over low heat or in the oven at 300°F (150°C) until just heated through. Avoid high heat to prevent drying.
- Freeze: Wrap tightly and freeze for up to 2 months.Thaw overnight in the fridge, then reheat gently.
- Meal prep tip: Slice before storing to make grab-and-go portions for quick lunches.
Benefits of This Recipe
- Low in carbs, high in protein: Ideal for keto and low-carb lifestyles, keeping you full without a carb crash.
- Nutrient-dense: Spinach adds fiber, iron, and vitamins A and K, while feta brings calcium.
- Weeknight fast: Done in about 25 minutes with minimal prep and only one pan.
- Crowd-pleasing flavors: Mediterranean-inspired filling feels bright and savory without being heavy.
- Flexible and forgiving: Easy to swap ingredients based on what’s in your fridge.
Common Mistakes to Avoid
- Overfilling the pork: Too much filling will spill out and burn. Keep a border and roll snugly.
- Skipping the sear: Browning adds flavor and color. Don’t rush this step.
- Overcooking: Pork tenderloin dries out fast.Use a thermometer and pull it at 140–145°F (60–63°C).
- Not resting the meat: Resting 5 minutes keeps it juicy and easier to slice.
- Underseasoning: Season both the meat and the filling. Taste the filling before stuffing.
Variations You Can Try
- Sun-Dried Tomato and Olive: Add chopped sun-dried tomatoes and Kalamata olives to the filling for a briny pop.
- Mushroom and Goat Cheese: Swap feta for goat cheese and fold in sautéed mushrooms and thyme.
- Spinach and Ricotta (still low-carb): Use whole-milk ricotta, extra garlic, and lemon zest for a creamier filling.
- Pesto Twist: Spread 1–2 tablespoons of basil pesto on the pork before the spinach mixture.
- Herb Crust Finish: Mix crushed pork rinds or almond flour with chopped parsley and olive oil, then pat on top before roasting for extra texture.
- Dairy-Free: Skip the cheese and add toasted pine nuts, extra lemon zest, and a drizzle of olive oil to the spinach.
FAQ
Can I use pork loin instead of pork tenderloin?
Pork loin is larger and takes longer to cook, so it won’t fit the 25-minute timeline. If you use it, butterfly more aggressively, pound thin, and extend the roasting time.
Still aim for 145°F (63°C) internal temperature.
What can I use instead of feta?
Goat cheese, ricotta, or cream cheese all work. Feta is salty and tangy, so if you swap it, add a pinch of extra salt and a bit of lemon zest to keep the brightness.
Can I make this ahead?
Yes. Assemble and tie the stuffed tenderloin up to 24 hours ahead.
Keep it covered in the fridge. Sear and roast just before serving, adding 2–3 extra minutes if it’s very cold going into the pan.
How do I keep the filling from leaking out?
Don’t overfill, and leave a small border. Roll tightly and secure with twine every couple of inches.
Searing gently over medium-high heat rather than blazing hot also helps prevent blowouts.
Is this recipe spicy?
Only mildly, from the red pepper flakes. For no heat, simply leave them out. For more heat, add extra flakes or a pinch of Aleppo pepper.
What sides go well with this?
Try roasted asparagus, garlicky green beans, a simple arugula salad with lemon vinaigrette, or cauliflower mash for a heartier keto plate.
Can I grill it instead of roasting?
Yes.
Sear over direct heat for 2–3 minutes per side, then move to indirect heat and grill with the lid closed until it reaches 145°F (63°C). Rest before slicing.
Jump to RecipeIn Conclusion
This 25-Min Keto Spinach and Feta Stuffed Pork Tenderloin is fast, flavorful, and weeknight-friendly. It delivers a juicy center, a savory filling, and a fresh finish from lemon and herbs.
With simple steps and everyday ingredients, you’ll have a low-carb dinner that feels special without taking all evening. Keep this one in your rotation for reliable, restaurant-style results at home.
