Roasted Pork Sandwich with Caramelized Onions and Mushrooms

In this pork sandwich recipe, crusty sandwich rolls are layered with savory steakhouse mushroom marinated roasted pork loin, caramelized onions and mushrooms, melted provolone cheese, and a hint of baby arugula.

This recipe was created in partnership with Smithfield.

pork sandwich recipe

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Creating This Pork Sandwich Recipe

Smithfield challenged me to create another 30-minute meal. This time I decided to use their Smithfield Steakhouse Mushroom Marinated Fresh Pork Loin Filet. Like I said last month when I made Slow Cooker Pork Carnitas Lettuce Wraps, something light and fresh for the upcoming spring and summer months.

I am always in need of new 30-minute meals to feed our family. School, homework, and associated after school activities are winding down. We’ll be just as busy during the summer juggling family vacation, summer camps and activities, afternoons at the pool, and me attempting to work from home during the summer while the kiddos are home.

It definitely isn’t impossible. But, it definitely takes some organization. Having a plan for meals that don’t take a long time to cook really gives me an extra boost on a daily basis.

The Smithfield Steakhouse Mushroom Marinated Fresh Pork Loin Filet sounded a little more hearty to me. I knew I wanted to make a recipe that reflected that. I immediately thought of a warm, toasted crusty sandwich roll piled high with sliced pork all sorts of hearty toppings.

Pairing the flavors of the mushroom marinated pork with plenty of sliced mushrooms and caramelized onions sounded like the perfect plan. I love a good, hearty sandwich bursting with flavor and lots of toppings for a variety of texture and complimentary tastes.

Smithfield Steakhouse Mushroom Marinated Fresh Pork Loin Filet takes 30 minutes or less to cook. I can get the rest of the ingredients prepared and laid out while the pork is cooking.

Sandwiches are definitely not just for lunch, in my opinion. I think they’re great for quick and easy dinner recipes on busy days. And I love that I can prep all the fillings pretty quickly.

After the ingredients are all prepped, everyone in the family can go through and assemble their own pork sandwich just how they like it. Sandwiches like this Roasted Pork Sandwich with Caramelized Onions and Mushrooms definitely makes a great weeknight meal.

For added flavor, I whipped up a quick horseradish mustard mayo. It provides just enough of a zing from the horseradish without being overpowering or too strong for the kids.

In my opinion, the horseradish mustard mayo and baby arugula were the perfect additions for the Roasted Pork Loin Sandwich with Caramelized Onions and Mushrooms.

But like any meal that requires some individual participation, the great thing is that the whole family can be happy with a meal like this because everyone can put their own twist on the final assemble. You can add more or less arugula, or use spinach instead.

You can even add a big slice of tomato to the Roasted Pork Sandwich with Caramelized Onions and Mushrooms, which would be so good during the summer months when they are ripe and juicy.

One of the best ways for us to have a stress-free easy mealtime in our family is serving something that everyone is happy with and enjoys. We all like pork, and sandwiches were a great vehicle to highlight the taste of Smithfield Steakhouse Mushroom Marinated Fresh Pork Loin Filet. Plus, it was a different way to serve a meat that frequents our dinner table.

roasted pork sandwich ingredients

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Pork Sandwich Ingredients

For the roasted pork itself, you’ll need:

  • Olive oil
  • Smithfield Steakhouse Mushroom Marinated Fresh Pork Loin Filet
  • Salt and pepper
  • Garlic powder

For the caramelized onions and mushrooms, you’ll need:

  • Olive oil
  • White mushrooms
  • Red onions
  • Salt and pepper

And the sandwich fixings you’ll want are:

  • Sandwich rolls
  • Butter
  • Mayonnaise
  • Horseradish mustard
  • Provolone cheese
  • Arugula
how to make pork sandwiches

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How to Make Pork Sandwiches

This pork loin sandwich is actually so easy to make! You’ll first need to season the pork loin, then bake in a greased pan for 20 minutes per pound. Once it’s fully cooked, let it rest for a few minutes before slicing.

While the pork cooks, you’ll need to make the caramelized onions and mushrooms. Once both of those tasks are done, you can make the roasted pork sandwiches!

I piled my pork sandwich with roasted pork, provolone cheese, caramelized onions and mushrooms, and horseradish mustard, then broiled the sandwich to melt the cheese. But you can assemble yours however you’d like.

How Do You Caramelize Onions?

Making caramelized onions and mushrooms is easier than you’d think. In a cast iron pan (or a pan that’s similarly heavy duty), heat a little olive oil over medium heat. Add the sliced onions to the pan and cook for about 5 minutes.

Add the sliced mushrooms to the pan and continue cooking on medium for roughly 5 minutes. Then turn the heat to medium-low and let the mushrooms and onions cook for another 10 minutes.

You should only stir the mixture every 5 minutes or so, because the veggies need time to properly caramelize.

Do I Have to Use Arugula?

Of course not! The arugula adds a nice bit and some color, but you can definitely use spinach or even lettuce (I would recommend red leaf lettuce) if you don’t like the flavor of arugula. Using baby arugula rather than regular arugula provides a milder taste.

How Do I Know When the Pork is Cooked Through?

The easiest way to tell when the roasted pork loin is finished cooking is when it reaches an internal temperature of 145ºF.

Roasted Pork Loin Sandwich with Caramelized Onions and Mushrooms

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Tips for Making Pork Sandwiches

The beautiful thing about these pork sandwiches is that they’re so easy to make and require few ingredients. But because the ingredient list if so minimal, it’s important that you buy good-quality rolls, cheese, etc. to go with the juicy roasted pork loin.

I like to toast the bread rolls before assembling the sandwiches. Toasting the bread not only adds great flavor and crunch, but it also prevents the bread from becoming soggy as soon as the sliced pork is laid on top of it.

Lastly, make sure you don’t have the heat turned up too high when caramelizing the mushrooms and onions. If the heat is too high, you’ll sauté the veggies rather than caramelize them. Caramelized onions and mushrooms take time to make, but the process is very straightforward.

More Easy Pork Recipes:

If you love all things pulled pork, you need to make this Smoked Pork Shoulder. It’s perfect for making pork tacos, pulled pork sandwiches, and more!

This Sheet Pan Pork Tenderloin with Roasted Vegetables takes just 35 minutes to whip up, and you can repurpose the leftovers so many ways.

Love the combination of pork and mushrooms? Then you’ll love this Roasted Pork with Mushrooms in Masala Sauce. Such an easy, comforting recipe!

I always serve my Slow Cooker Pork Carnitas with homemade mango salsa, but this is a versatile recipe you can doctor up however you’d like.

Jazz up any Tex-Mex recipe with this Slow Cooker Southwestern Pulled Pork. It’s perfect in burrito bowls, tacos, and more!

For more delicious, easy and seasonal recipe ideas to help you get dinner on the table quickly, check out Smithfield’s website. Let me know if you try this recipe and what you think of it by leaving a comment below.

What is your favorite easy dinner recipe?

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Roasted Pork Sandwich with Caramelized Onions and Mushrooms

Roasted Pork Sandwich with Caramelized Onions and Mushrooms

Yield: serves 6
Prep Time: 15 minutes
Cook Time: 35 minutes
Total Time: 50 minutes

Crusty sandwich rolls are layered with savory steakhouse mushroom marinated roasted pork loin, caramelized onions and mushrooms, melted provolone cheese, and a hint of baby arugula.

Ingredients

For the Roasted Pork

  • 1 tablespoon Olive Oil, divided
  • Smithfield Steakhouse Mushroom Marinated Fresh Pork Loin Filet
  • Salt, Pepper, and Garlic Powder, to taste

For the Onions and Mushrooms

  • 2 teaspoons Olive Oil
  • 12 ounces Sliced White Mushrooms
  • 2 medium Red Onions, sliced
  • Salt and Pepper, to taste

For the Sandwich Assembly

  • 6 Sandwich Rolls, sliced in half
  • 3 tablespoons Butter, softened
  • 4 tablespoons Mayonnaise
  • 2 tablespoons Horseradish Mustard
  • Prepared Pork
  • Prepared Onions and Mushrooms
  • 6 slices Provolone Cheese
  • Baby Arugula Leaves

Instructions

FOR THE ROASTED PORK

  1. Preheat oven to 400 degrees F.
  2. Grease a small roasting pan with the olive oil.
  3. Season the Smithfield Steakhouse Mushroom Marinated Fresh Pork Loin Filet with pepper, and garlic powder on all sides according to your personal taste preferences.
  4. Place pork loin in the greased pan.
  5. Bake the pork loin 20 minutes per pound until the meat reaches an internal temperature of 145F.
  6. Allow the pork to rest for 5 minutes prior to slicing.
  7. After resting, slice into 1/4 inch thick slices.

FOR THE ONIONS AND MUSHROOMS

  1. While the pork is cooking, prepare the onions and mushrooms.
  2. In a heavy bottom cast iron pan, warm the olive oil over medium heat.
  3. Add the onions, sprinkle with 1/8 teaspoon salt, or to taste, and saute for about 5 minutes over medium heat.
  4. Add the mushrooms and continue to sauté for 5 minutes.
  5. Then, reduce to medium low and continue to cook for 10 minutes, or until they tender and golden, stirring the mixture every 5 minutes.
  6. Remove from heat and set aside.

FOR THE SANDWICH

  1. Butter the insides of the roll lightly with butter and broil butter sides up just until they are golden brown, about 2 - 3 minutes.
  2. In a small bowl, combine the mayonnaise and horseradish mustard. Mix well.
  3. To prepare a sandwich, spread the inside of the bread with the horseradish mustard mayonnaise mixture, top with sliced pork (dividing the total amount between 6 sandwiches), then top the pork with 1/6th of the mushroom mixture and a slice of provolone cheese.
  4. Broil until the cheese is melted, about 1 minute (or less).
  5. Then, add a small amount of baby arugula leaves to the sandwich.
  6. Place the top of the roll over the fillings.
  7. Cut in half and eat immediately.

Notes

The sandwiches are best eaten immediately. For leftover pork, it is better to store it unassembled and make additional sandwiches later than it is to prepare all of the sandwiches and reheat them.

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I am privileged to have working relationship Smithfield on Good Life Eats. I’ve been compensated for my time in creating this recipe for Roasted Pork Sandwich with Caramelized Onions and Mushrooms. As always – my opinions are my own!