RECIPE: Mustardy Pork Tenderloin with Grapes and Red Onions  


This recipe comes to us from Alexis deBoschnek's book “To the Last Bite: Recipes and Ideas for Making the Most of Your Ingredients.” Read Bluedot's Q&A with deBoschnek on how careful cooking can combat food waste.

This pork tenderloin is surprisingly simple, and one of my go-to recipes. What makes this an all-time great for me is the grapes. Trust me on the grapes—as they roast, they soften and become almost saucy. This is the perfect way to use up any that have started to lose their firmness, as they’ll cook down so much it’ll be unnoticeable. They cook alongside red onions and mustard-slathered pork, which means this dish walks the line between sweet, spicy, and savory. This recipe can be easily doubled and makes great leftovers reheated or straight from the fridge. 

Tenderloin is not to be confused with pork loin, a wider, flatter cut that comes from an entirely different part of the pig. While I’m all about swaps, these two cuts can’t be used interchangeably without adjusting the cooking time, so make sure you buy the right type of loin. 

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Pork Loin with Onion and Grape

RECIPE: Mustardy Pork Tenderloin with Grapes and Red Onions  

  • Author: Alexis de Boschnek
  • Yield: Serves 2 to 4 1x


Units Scale
  • 1 1/2 pounds pork tenderloin
  • 1 teaspoon kosher salt
  • 1/2 teaspoon freshly ground black pepper
  • 1 1/2 tablespoons Dijon mustard
  • 2 tablespoons grapeseed oil
  • 2 cups (1/2 bunch) seedless red grapes
  • 1 red onion, thinly sliced
  • 1/2 teaspoon crushed red pepper flakes


  1. On a cutting board, pat the pork tenderloin dry with paper towels. Season with the salt and black pepper on all sides, then rub the tenderloin with the Dijon.
  2. Heat the grapeseed oil in a cast iron or stainless steel pan over medium-high heat. Once the oil begins to shimmer, add the tenderloin and sear on all sides until browned, about 4 minutes per side. Add the grapes, onion, and red pepper flakes, then transfer to the oven. Roast for 15 to 18 minutes, or until the internal temperature of the tenderloin reaches 135°F.
  3. Remove the tenderloin from the pan and transfer to a cutting board to rest for 10 minutes before slicing. Meanwhile, place the pan back in the oven to continue roasting until the grapes have cooked down and collapsed on themselves, 8 to 10 minutes.
  4. Slice the pork and serve topped with the onion and grapes. The pork can be stored in a sealed container in the refrigerator for up to 3 days.

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Alexis deBoschnek
Alexis deBoschnek
Alexis deBoschnek is a recipe developer and host based in the Catskills in upstate New York. Her first cookbook, To the Last Bite, is was published in Spring 2022 by Simon & Schuster. Before going freelance she was the Senior Test Kitchen Manager at BuzzFeed’s Tasty. She has contributed recipes to Food52, The Kitchn, Chowhound, and Tasting Table.
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