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    Home » Recipes » Dinner

    Easy Leftover Steak Fajitas

    Published: Dec 7, 2023 · Modified: Mar 25, 2025 by Natalie Perry · This post may contain affiliate links · 6 Comments

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    Do you already have cooked meat? Transform your extra steak into amazing fajitas with our easy leftover steak fajitas recipe! Perfect for a quick meal, these flavorful steak fajitas make leftover nights delicious. I often intentionally cook enough to ensure we have leftovers. It is ready in 15 minutes or less!

    A finished steak fajita on a corn tortilla, generously filled with seasoned meat, peppers, and onions, topped with avocado and a dollop of sour cream. this …

    This fajita recipe features succulent steak strips marinated in fajita seasoning, paired with sautéed bell peppers and onions.

    For more fun fajita recipes, check out our Keto Fajita Casserole! For another easy dinner using leftovers, try our Healthy Split Pea Soup! Use leftover shredded chicken with a Lazy Keto Parmesan Chicken Casserole.

    Remember, starting with healthy intentions is key. For more insights on setting powerful intentions and using affirmations in your daily life, check out our guide on setting intentions and using affirmations.

    Jump to:
    • Ingredients
    • Substitutions and Variations
    • How to Make Leftover Steak Fajitas
    • Expert Tip
    • Leftover Steak Fajitas FAQ's
    • More Quick Dinner Recipes
    • Recipe
    • Comments

    Ingredients

    Ingredients laid out for leftover steak fajitas.

    Leftover Steak:  For the best quality and flavor, I recommend using grass-fed steak. We used filet mignon this time, however, we have also used sirloin steak and it tastes just as good. My favorite steak to use for fajitas is usually flank or skirt steak but for leftovers, we use whatever we have and it is just as delicious! Just be sure to cut them into thin slices!

    Fajita Seasoning: We love using Spice Hunter Fajita Seasoning from Sprouts for its wonderful blend of spices. If you prefer, you can also make homemade fajita seasoning or find another organic, unprocessed seasoning mix.

    Tortillas: For those who prefer grain-free and gluten-free options, Siete brand cassava flour tortillas are our go-to.

    Substitutions and Variations

    Keto Version: For those on a keto diet, swapping out the tortillas for a bowl of cauliflower rice can transform your steak fajitas into a delectable steak rice bowl.

    Protein Variations: Not into beef fajitas? Shrimp fajitas and chicken fajitas work well with this recipe too! 

    Different ways to repurpose leftovers: Your leftover steak can also be transformed into steak quesadillas for a different meal option. Add some veggies, cheese, and even black beans with your steak tossed with peppers and topped with your favorite garnishes.

    How to Make Leftover Steak Fajitas

    Step 1: Warm a large skillet over medium-high heat and pour in the oil. Toss in the onions, garlic, and red and green peppers. Stir them occasionally, allowing them to become tender over about 5 minutes.

    Tortillas warming in a skillet.

    Step 2: Warm tortillas in another skillet over medium-low heat for a couple of minutes.

    liced leftover steak mixed with red and green bell pepper strips in a large skillet, seasoned for fajitas and ready for cooking

    Step 3: Add thin strips of steak to the skillet with the vegetables. Season well with your chosen spice blend, stirring to ensure the flavors combine beautifully.

    A gluten-free tortilla loaded with seasoned steak, sautéed peppers, onions, and topped with fresh pico de gallo and avocado slices.

    Step 4: Finally, assemble your fajitas by placing the sizzling fajita meat and veggies onto the warm tortillas. Garnish with avocado, fresh tomato, sour cream, and cilantro!

    Hint: To ensure the seasoning coats the meat and veggies evenly, consider adding a little extra oil or water to your skillet. This simple trick helps distribute the fajita spices more thoroughly, guaranteeing that each bite is packed with flavor.

    Expert Tip

    When making your leftover steak fajitas, let the steak reach room temperature before reheating and adding it to the skillet. This ensures that the meat heats evenly and retains its tenderness, preventing it from becoming tough or chewy. Do not overcook!

    Add the steak to the skillet last, after the vegetables have softened. This way, the steak absorbs the flavors of the garlic, onions, and peppers, enhancing the overall taste of your fajitas.

    Leftover Steak Fajitas FAQ's

    What cut of meat is best for steak fajitas?


    For steak fajitas, flank or skirt steak is traditionally preferred due to its rich flavor and suitable texture. However, when using leftovers for this recipe, any cut of steak works well. Filet mignon, top sirloin, or ribeye leftovers can also be used effectively, offering a tender and flavorful addition to your fajitas.

    How do you eat leftover steak?


    Leftover steak can be enjoyed in many ways. It can be sliced thin and added to salads, sandwiches, or wraps. Another delicious option is to cut it into strips for use in dishes like steak fajitas, stir-fries, or steak quesadillas. The key is to reheat it gently to retain its moisture and tenderness.

    How do you make leftover steak juicy?

    To keep leftover steak juicy when reheating, start by letting the steak come to room temperature. Then, reheat it slowly on a lower heat setting in a skillet. You can add a bit of moisture like broth, water, or a drizzle of oil to help retain its juiciness. Covering the skillet for a few minutes during reheating can also help to lock in the moisture. Avoid microwaving as it can make the steak tough and dry.

    Seasonings being sprinkled over sliced steak and sautéed peppers and onions in a skillet, preparing for the perfect fajita mix.

    More Quick Dinner Recipes

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      Bacon Ranch Keto Chicken and Rice Casserole
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    Do you love these Leftover Steak Fajitas? Give them a 🌟 review and let us know how it went in the comments👇! Don't forget to subscribe to our weekly newsletter to never miss a healthy recipe!

    Recipe

    A finished steak fajita on a corn tortilla, generously filled with seasoned meat, peppers, and onions, topped with avocado and a dollop of sour cream.

    Easy Leftover Steak Fajitas

    Natalie Perry
    Transform your leftover steak into a mouth-watering, family-friendly meal with these Easy Leftover Steak Fajitas. This recipe is not only healthy and gluten-free, but it also offers a perfect way to repurpose steak from your Sunday dinner into a delicious meal for the next day. Quick, flavorful, and packed with veggies, these fajitas are ready in just 15 minutes!
    5 from 34 votes
    Print Recipe Pin Recipe
    Prep Time 5 minutes mins
    Cook Time 10 minutes mins
    Total Time 15 minutes mins
    Course Main Course
    Cuisine American, Mexican
    Servings 4
    Calories 458 kcal

    Equipment

    • large skillet
    • Separate skillet for tortillas
    • Cutting board and sharp knife
    • Measuring Spoons and Cups
    • Cooking Spoon

    Ingredients
      

    • 16 oz Leftover steak cut into strips
    • 1 red bell pepper sliced
    • 1 green bell pepper sliced
    • 1 onion sliced
    • 2 cloves garlic minced
    • Avocado oil
    • Fajita seasoning
    • Gluten-free tortillas e.g., cassava flour tortillas
    • *Optional toppings Greek yogurt or sour cream, avocado slices, lime wedges
    Get Recipe Ingredients

    Instructions
     

    • Heat oil in a large skillet over medium-high heat. Add onions, garlic, and peppers, sautéing until soft (about 5 minutes).
    • Warm tortillas in a separate skillet over medium-low heat.
    • Add steak strips to the skillet with the vegetables and season generously. Sauté, letting the flavors meld together.
    • Assemble fajitas by adding meat and vegetables to a warmed tortilla. Serve with desired toppings.

    Video

    Notes

    *For the best flavor, allow leftover steak to reach room temperature before adding to the skillet. Add steak to the skillet after the vegetables have softened for optimal flavor infusion. 
     
    *The nutrition facts include 2 tortillas per serving. Nutrition facts do not include toppings

    Nutrition

    Calories: 458kcalCarbohydrates: 30gProtein: 23gFat: 28gSaturated Fat: 13gPolyunsaturated Fat: 1gMonounsaturated Fat: 11gCholesterol: 79mgSodium: 339mgPotassium: 506mgFiber: 6gSugar: 4gVitamin A: 1042IUVitamin C: 65mgCalcium: 52mgIron: 4mg
    Tried this recipe?Let us know how it was!

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    Comments

      5 from 34 votes (31 ratings without comment)

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      Recipe Rating




    1. Kim Beaulieu says

      December 08, 2023 at 12:52 am

      5 stars
      This is such a great recipe. I'm always looking for ways to use up leftovers. We all loved this!

      Reply
      • Natalie Perry says

        December 08, 2023 at 6:34 pm

        Wonderful! Thank you for sharing

        Reply
    2. Nora says

      December 07, 2023 at 9:43 am

      5 stars
      Great, gluten-free Fajita version! Love it!

      Reply
      • Natalie Perry says

        December 08, 2023 at 6:35 pm

        🙂

        Reply
    3. Andréa says

      December 07, 2023 at 9:18 am

      5 stars
      I hate throwing away leftover meat. And these fajitas look so good. I think I'm going to prepare some extra steak next time, so I can make them. 😉

      Reply
      • Natalie Perry says

        December 08, 2023 at 6:35 pm

        Such a great idea! Shortens the next dinner prep!

        Reply
    A woman smiling with long brown hair and flowered v-neck dress shirt on.

    Hello there! My name is Natalie. My passion is creating and sharing healthy recipes, tips, and affirmations for a healthy mind and body. I am a wife, mom, certified holistic nutrition specialist, hypnotherapist, reiki master, and healthy food blogger! I enjoy learning, creating, and sharing healthy recipes that the whole family will love.

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