Steak Fajita Sandwiches

4.50 from 2 votes

Lunch time just got way more exciting!

Our healthy, family-friendly Steak Fajita Sandwiches are perfect for lunch or dinner.

Add some excitement back to lunch or dinner with these incredible steak fajita sandwiches. Eating the same meals can get boring, which can lead anyone to get off-track with their diet plan. These delicious sandwiches offer your favorite Tex-Mex flavors that are sure to get you looking forward to meal time again! They not only taste amazing and provide you with plenty of nutrients, but they also convert the traditional messy fajita into an easy and convenient on-the-go meal.

Fuel for Hours and Vitamins Aplenty

This 30-minute meal makes an excellent lunch or dinner.

Healthy sandwiches are a classic go-to for homemade lunches, although these are just as wonderful for dinner. Each serving is hearty enough to fill you up and satisfy your fajita cravings, all without making you feel stuffed and full of salt (like so many fajita recipes do). 

First and foremost, these steak fajita sandwiches are loaded with protein. Protein is essential for maintaining and building lean muscle mass, fighting cravings, and keeping you full and satisfied. According to the USDA’s regulations, grass-fed sirloin tip qualifies as very-lean, making it one of the healthiest cuts of beef available! 

Furthermore, veggies like white mushrooms, red onions, and bell peppers add a hefty dose of nutrients (plus flavor and texture!) without tacking on a bunch of excess calories. White mushrooms are a fantastic source of vitamin D, which is vital for bone health. Red onions are very low in calories yet offer quite a bit of immune-boosting vitamin C. Last but not least, bell peppers are also rich in vitamin C as well as potassium. This mineral plays a very important role in maintaining healthy cell and muscle function within the body. 

The Envy of the Break Room

These tender steak sandwiches will allow you to enjoy your favorite fajita flavors on your lunch break!

Bringing a sizzling plate of fajitas to work for lunch obviously isn’t practical. Our steak fajita sandwiches are the next best thing! The combination of perfectly sauteed veggies and tender beef, wrapped up into a neat little pita package, are sure to be the envy of the break room come lunch time.

While you can eat these steak fajita sandwiches cold, we highly recommend packing the ingredients separately in your lunch box and assembling them once you’re ready to eat. Keep the veggie and meat mixture in a microwave-safe container so you can heat them up in the microwave. Once hot, you can stuff your pita and top it with the lettuce and Greek yogurt. The final result smells and looks incredible, so be prepared to share the recipe with your co-workers.

We Love Easy Meals!

Tender sirloin tip and sauteed mushrooms, onion, and bell peppers combine to creat these tasty fajita pockets!

This family-friendly option has a lot going for it. It’s loaded with nutrients, smells and tastes incredible, and it’s super simple to prepare! 

The very first thing you should do is clean and slice your veggies. You can do this a day or two ahead of time if you know it’s going to be a busy day. Before you start cooking, you’ll also want to slice your steak into thin strips so it’s ready to go when it comes time to add it into the pan. 

You’re going to want to use a large frying pan for this recipe. Begin by sauteing the white mushrooms in olive oil over medium heat for around six minutes. Next, add in the red onion, garlic, and bell pepper. Stir in to combine with the mushrooms, and saute for an additional four minutes or so. Turn the heat to medium, add in your sirloin strips, and cook for 5 to 10 minutes.

Finish off the veggie and meat mixture by sprinkling some salt, pepper, and dried oregano and simmering for five additional minutes. Remove the pan from the heat, drain any excess fluid, and divide the mixture into the pitas. Add in the torn romaine pieces and plain Greek yogurt and enjoy!

More Snacks for Your Lunch Box

These homemade sweet potato chips are the perfect on the go snack!

These steak fajita sandwiches are great for your midday meal, but having one or two healthy snacks to munch on throughout the day can keep you from wandering towards the vending machine. Try making any of these yummy snack recipes to pack alongside your steak wraps:

4.50 from 2 votes

Steak Fajita Sandwiches

This yummy recipe converts the traditional fajita into an easy and mess-free meal!
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Yield 4 people
Serving Size 1 each
Course Dinner, Lunch
Cuisine Mexican, Tex-Mex
Author SkinnyMs.


  • 4 ounces white mushrooms sliced
  • 1 tablespoon olive oil
  • 1 red onion medium, sliced into strips
  • 2 garlic cloves minced
  • 1 red bell pepper medium, cut into strips
  • 1 pound beef sirloin tip steak cut into thin strips - grass-fed beef recommended
  • salt to taste
  • 1/2 teaspoon black pepper
  • 2 teaspoons dried oregano
  • 2 pita pockets cut in half - gluten free or whole-wheat
  • 4  romaine lettuce leaves torn
  • 1/4 cup Greek yogurt plain nonfat


  • In a large skillet, on medium-low heat, sauté mushrooms in olive oil about 6 minutes. Add onion, garlic, and bell pepper, and continue sautéing until onion and pepper are tender, about 4 minutes. Add in sirloin strips, and cook on medium heat for 5–10 minutes, or until no longer pink. Sprinkle with salt, pepper, and oregano. Stir well, cover, and simmer 5 more minutes. Drain mixture.
  • Stuff pita halves with meat mixture and romaine lettuce, and top with a dollop of yogurt.

Nutrition Information

Serving: 1each | Calories: 293kcal | Carbohydrates: 24g | Protein: 31g | Fat: 8g | Saturated Fat: 2g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 70mg | Sodium: 226mg | Potassium: 773mg | Fiber: 3g | Sugar: 4g | Vitamin A: 3390IU | Vitamin C: 42mg | Calcium: 82mg | Iron: 4mg |
SmartPoints (Freestyle): 7
Keywords Quick and Easy

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Looking for other healthy lunch ideas? We’ve got you covered! You might also like to try any of these nutritious and delicious recipes:

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Editor’s Note: This post was originally published on August 2, 2012.

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The SkinnyMs. team believes that all people, regardless of age, size, and fitness level, have the power to transform their lives — they just need the resources to do so. The SkinnyMs. method promotes healthy living through a combination of clean eating and regular exercise. We offer everything you need to be successful.

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  1. I just started WEight watchers and I was at a loss as what to cook, I am so glad I found your website with all the delicious looking recipes. This will be my go to for my meals. Thank you.

    1. Hi! These are fajita sandwiches and use pita rather than a tortilla which has more calories. Each steak fajita recipe will have a different number of calories depending on the cut of steak used, the amount of olive oil used (or any other oil) etc.

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