Herb-Roasted Pork Tenderloin with Caramelized Onions

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Tender pork tenderloin roasted with rosemary and thyme, served with sweet caramelized onions for a flavorful keto main. This french-inspired pork ready in about 40 minutes pairs (1.5 lb) pork tenderloin, finely chopped rosemary, finely chopped thyme for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 360 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

★ 4.1 (9 ratings) Prep: 15 min Cook: 25 min Serves 4 French cuisine 360 cal/serving
Plan a meal with the AI → Shop this recipe on Instacart → Shop equipment ↓

Ingredients

Instructions

  1. Step 1: Preheat oven to 425°F. Pat pork tenderloin dry with paper towels.
  2. Step 2: Rub 2 tbsp olive oil, 1 tsp chopped rosemary, 1 tsp chopped thyme, 1/4 tsp salt, and 1/4 tsp black pepper over the entire tenderloin.
  3. Step 3: Heat a skillet over medium-high heat. Sear the pork for 3 minutes per side until golden brown.
  4. Step 4: Transfer pork to a roasting pan, then add 2 thinly sliced onions to the skillet.
  5. Step 5: Cook onions over medium heat for 8 minutes until softened, then add 1 tbsp balsamic vinegar and cook for 2 more minutes until caramelized.
  6. Step 6: Place caramelized onions around the pork in the roasting pan. Bake for 20-25 minutes until pork reaches 145°F internal temperature.
  7. Step 7: Let rest for 10 minutes before slicing and serving with onions.

Equipment for this recipe

Top-rated tools to make this recipe successfully.

More Bakeware & baking tools → Shop all kitchen tools →

Frequently asked questions

How long does Herb-Roasted Pork Tenderloin with Caramelized Onions take to make?

Total time is about 40 minutes (15 min prep + 25 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Herb-Roasted Pork Tenderloin with Caramelized Onions?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep (1.5 lb) pork tenderloin from drying out.

Can I substitute ingredients in Herb-Roasted Pork Tenderloin with Caramelized Onions?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Herb-Roasted Pork Tenderloin with Caramelized Onions for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Herb-Roasted Pork Tenderloin with Caramelized Onions?

French pork like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

What others are saying

Related recipes