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Easy Steak Fajitas are tender, juicy and full of flavor! Best of all, they come together super quick and are perfect for busy weeknights. Marinated in a homemade fajita spice blend and cilantro a delicious Tex-Mex cilantro lime marinade. Low carb and keto friendly serving options and great for meal prepping on Sunday for work or school lunchboxes or lunch bowls.

Meal Prep Steak Fajitas

Meal Prep Steak Fajitas are tender, juicy and full of flavor! Best of all, they come together super quick and are perfect for busy weeknights.

Course Main Course
Cuisine Mexican
Keyword meal prep, mexican, skillet, steak, steak fajitas
Prep Time 17 minutes
Cook Time 12 minutes
Total Time 29 minutes
Servings 4
Calories 532 kcal
Author Kelly


  • For the fajita seasoning:
  • 2 teaspoons chili powder
  • 1 teaspoons cumin
  • 1 teaspoon garlic powder
  • 1 teaspoon onion powder
  • 1 teaspoon smoked paprika
  • 1/4-1/2 teaspoon sea salt or to taste
  • For the fajitas:
  • 3 tablespoons olive oil divided
  • juice from 2 limes divided
  • 1 tablespoon Dijon mustard paleo/keto brand as necessary OR Worcestershire sauce
  • 1 ½ pounds skirt or flank steak
  • 4 medium bell peppers thinly sliced into strips
  • 1 medium red onion thinly sliced into strips
  • 1-2 tablespoons unsalted butter

For Serving:

  • lime wedges,
  • sliced avocado
  • warm tortillas
  • FOR LOW CARB: low carb tortillas or cauliflower rice
  • FOR MEAL PREP: lunch containers


  1. Combine all the ingredients for the homemade seasoning. Reserve 1 1/2 teaspoons for the bell peppers.

  2. In a large resealable bag, combine 2 tablespoons of olive oil, lime juice, mustard and 5 teaspoons of the fajita seasonings. Add the steak, and press the bag in to evenly distribute the flavors. Allow to sit while you prepare the vegetables.

  3. Prepare the bell peppers and onions by slicing into thin strips.

  4. Heat 1 tablespoon olive oil in a large pan over medium-high heat. Add the onions and allow to cook for about 3-4 minutes, or until softened and fragrant. Add the bell peppers and sprinkle with the reserved 1 1/2 teaspoons of fajita seasonings. If you like the peppers with a nice crunch - cook for about 3-5 minutes. And if you like them softer, leave them on for about 3 minutes longer. Transfer and set aside on a plate.

  5. Melt butter on the same skillet. Add the steak and sear undisturbed for 3 to 4 minutes on each side. Cook longer if you like your steak more well done. Transfer steak to a cutting board and allow to rest for at least 5 minutes before slicing into thin strips.
  6. Serve hot with heated tortillas, avocado slices and lime wedges plus any other toppings of your choice.

  7. For a low carb version, you can use coconut wraps, low carb tortillas or serve over some lettuce or cauliflower rice.

  8. For Meal Prep: Divide evenly into lunch containers.
Nutrition Facts
Meal Prep Steak Fajitas
Amount Per Serving (1 g)
Calories 532 Calories from Fat 342
% Daily Value*
Fat 38g58%
Saturated Fat 14g70%
Cholesterol 111mg37%
Sodium 447mg19%
Potassium 795mg23%
Carbohydrates 11g4%
Fiber 3g12%
Sugar 6g7%
Protein 36g72%
Vitamin A 4450IU89%
Vitamin C 154.3mg187%
Calcium 34mg3%
Iron 4.2mg23%
* Nutrition facts are provided as a courtesy using the WPRM recipe calculator. It is best to make your own calculations to ensure accuracy. We expressly disclaim any and all liability of any kind with respect to any act or omission wholly or in part in reliance on anything contained in this website. Percent Daily Values are based on a 2000 calorie diet.