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Caramelized Onions & Mushrooms on Sliced Pork Tenderloin on plate. This recipe is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.

Caramelized Onions & Mushrooms on Pork Tenderloin

Caramelized Onions & Mushrooms on Pork Tenderloin is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.

Course Main Course
Cuisine American
Keyword christmas dinner, dinner, mushrooms, onions, pork, pork roast, pork tenderloin
Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings 4 Servings
Calories 305 kcal
Author Carrie Tyler

Ingredients

Pork Tenderloin

  • 1 pound Pork Tenderloin
  • 1 teaspoon Extra Virgin Olive Oil
  • 1/2 teaspoon Dried Oregano
  • 1/2 teaspoon Garlic Powder
  • 1/2 teaspoon Onion Powder
  • 1/2 teaspoon Ground Pepper
  • 1 teaspoon Salt

Caramelized Onions & Mushrooms

  • 2 Tablespoons Extra Virgin Olive Oil
  • 2 Medium Yellow Onions
  • 1/2 teaspoon Salt
  • 1/2 teaspoon Ground Pepper
  • 1 Tablespoons Ghee or Butter
  • 8 ounces Sliced Mushrooms
  • 1 Tablespoons Balsamic Vinegar
  • 1 teaspoon Dried Oregano

Instructions

  1. You can make the Caramelized Onions & Mushrooms a day or two ahead and store them in the fridge or make them while you cook the pork tenderloin.
  2. For the mushrooms, you can either buy them already sliced or whole and slice them yourself.
    Sliced raw mushrooms in carton for the Caramelized Onions & Mushrooms on Pork Tenderloin recipe. This is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.
  3. Peel the onion, slice in half, then thinly slice. Slices should be about the width of the chefs knife.
    Knife starting to slice onions on cutting board for the Caramelized Onions & Mushrooms on Pork Tenderloin recipe. This is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.
  4. Once they are all sliced, separate the onions with your fingers.
    Sliced onions in hand and on cutting board for the Caramelized Onions & Mushrooms on Pork Tenderloin recipe. This is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.
  5. To a large preheated skillet, drizzle the olive oil and then add the onions. Stir to coat in the oil, add salt and pepper. Cook the onions on medium-low heat for 20 minutes, stirring every 5 minutes or so.
    Sliced onions cooking in skillet for the Caramelized Onions & Mushrooms on Pork Tenderloin recipe. This is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.
  6. Push the onions over to one side of the skillet and add the Ghee or butter to the open space and then the mushrooms. Saute the mushrooms for 10 minutes until browned. 

    Sliced onions cooked on one side of skillet and raw mushroom slices in the other half for the Caramelized Onions & Mushrooms on Pork Tenderloin recipe. This is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.
  7. Then mix the onions and mushrooms together, add the oregano and balsamic vinegar, and cook down for a final 10 minutes.

    Caramelized Onions and mushroom slices in skillet for the Caramelized Onions & Mushrooms on Pork Tenderloin recipe. This is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.
  8. At this point, you can keep it warm or save it in a glass storage container in the fridge so that you can reheat it later.
    Close up of Caramelized Onions and mushroom slices in skillet for the Caramelized Onions & Mushrooms on Pork Tenderloin recipe. This is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.
  9. Make the pork spice rub by adding to a small mixing bowl, the Dried Oregano, Garlic Powder, Onion Powder, Salt, and Pepper. Stir to combine.
    Dried Oregano, Garlic Salt, Pepper, Salt, & Onion Powder in bowl for the Caramelized Onions & Mushrooms on Pork Tenderloin recipe. This is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.
  10. Spray or rub all sides of the pork tenderloin with extra virgin olive oil, then sprinkle and rub the seasoning all over the outside. Then place the tenderloin under the broiler for 5-8 minutes until the top is nicely browned. Move the pork down to the center rack and cook at 400 F degrees for 10-15 minutes or until the internal temperature reaches 145 F.
    Seasoned raw pork tenderloin on pan for the Caramelized Onions & Mushrooms on Pork Tenderloin recipe. This is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.
  11. When the pork tenderloin is done cooking, let it rest for 10 minutes tented with aluminum foil to allow the juices to redistribute. Then slice the pork and serve with the Caramelized Onions and Mushrooms.
    Caramelized Onions & Mushrooms on Sliced Pork Tenderloin on plate. This recipe is such a flavorful main dish!  The pork tenderloin is moist and juicy and topped with Onions & Mushrooms that are sauteed low and slow with a touch of balsamic to bring out all of the natural sugars and caramelize them to perfection.

Recipe Video

Recipe Notes

  1. Substituting Pork chops: Sear them in the pan first, before starting the onions. Season the pork chops with salt and pepper on both sides liberally. Preheat a large skillet on high heat and add 2 teaspoons of Extra Virgin Olive Oil to the skillet to coat and then add the pork chops to sear. Leave cooking without moving for 4-5 minutes. When they easily lift, flip the chops over to sear the other side for another 4 minutes. Transfer them to the oven and bake at 400 F degrees for 10 minutes.
  2. You can substitute in unsalted butter for the ghee
  3. You can make the caramelized onions and mushrooms up to 4-5 days in advance and store them covered in the fridge. I would make the pork tenderloin when you are ready to serve. Simply reheat the onions and mushrooms in a pan on the stove for about 5 minutes until warmed through.
  4. Yes, you can freeze the caramelized onions and mushrooms in an airtight container in the freezer for up to 6 months. Thaw them in the refrigerator overnight and then reheat the onions and mushrooms in a pan on the stove for about 5 minutes until warmed through.