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Beef Fajitas in the Oven Recipe

Beef Fajitas in the Oven
Recipe and Photo by Megan Barrett | Scratch to Basics

Quick prep. Quick bake. Quick clean-up. Try these simple, mouth-watering beef fajitas by October Featured Chef Megan Barrett. They are perfect for a week-night meal and pair well with Megan’s homemade tortillas and guacamole for bonus fat and fiber. 

“Looking for an easy and delicious weeknight dinner? Make beef fajitas in the oven tonight. Sheet pan dinners are one of my favorite types of meals to cook for my family. And these sirloin steak sheet pan fajitas are table ready in 30 minutes with great flavor and easy cleanup.

With this fajita tray bake, you’ll chop your veggies, season your steak, and put everything on the sheet pan, and stick it in the oven. Dinner will be ready for you 20 minutes later! It’s really that easy.

While your beef fajitas are cooking in the oven, you can set the table or pour yourself a glass of wine and relax.

I like mixing up the veggies in this recipe to use what I have on hand. So, while the recipe at the bottom of the page calls for carrots, peppers, and onions, you could easily omit one or more of those, or swap them out for another vegetable.”

Beef Fajitas in the Oven
Recipe and Photo by Megan Barrett | Scratch to Basics


Beef Fajitas in the Oven

Recipe By: Megan Barrett | Scratch to Basics

Yield: 4 servings
Prep Time: 10 minutes
Cook Time: 20 minutes
Total Time: 30 minutes

USWM Shopping List: Sirloin Steak


  • 1 lb sirloin steak
  • 2 bell peppers
  • ½ onion
  • 2 large carrots
  • 2 Tbs oil
  • ½-1 tsp salt (enough to sprinkle over veggies and meat)
  • 4 tsp chili powder
  • 2 tsp cumin
  • 1 tsp garlic powder
  • 1 lime
  • cilantro, for garnish (optional)


  1. Slice your veggies into strips – carrots about ¼″ wide, peppers and onions about between ¼″ and ½″ wide.
  2. Preheat oven to 400 (F).
  3. Arrange everything on your sheet pan in a single layer (or two, depending on the size you have).
  4. Drizzle oil evenly over everything.
  5. Sprinkle salt evenly over everything.
  6. Mix the spices together in a small bowl and sprinkle about half the mixture over the veggies, and rub the rest into both sides of the meat.
  7. Put the halved lime on the sheet pan, cut side down and bake with everything else for extra flavor.
  8. Bake for 15-20 minutes. If your steaks are smaller, you’ll want to pull them out earlier. Timing on the steak depends on the done-ness that you want.
  9. Squeeze the lime juice over the cooked veggies and meat, then enjoy!
  10. Eat the meat and veggies with tortillas or on a bed of lettuce.
  11. Top with guacamole and cilantro (optional)

Nutritional Information

Yield: 4

Serving Size: 1

Amount Per Serving: 

SODIUM: 449mg


Find a variety of other nutrient-dense recipes on our Discover Blog.


Megan Barrett, October Featured Chef, Bio

Megan Barrett

I’m a firm believer that food doesn’t have to be complicated to be delicious. I make delicious food daily and it’s NEVER complicated. Trust me. I don’t have time for complicated. I need easy. Easy to remember recipes, simple ingredients, and fast recipes that are packed with nutrition and flavor. Right around the time I started Scratch to Basics, I began a food journey of my own. I’ve been wandering down the road of elimination diets and food sensitivities. I’ve learned that I feel best when I avoid certain foods. For that reason, most of the recipes you’ll see on the blog are gluten free, dairy free, and/or Paleo.

My family and I are on a journey towards living a simpler life, growing our own food, and spending time on things that matter most. We are paying more attention to where our food comes from, and what’s inside it. I believe we can make a difference by making sustainable choices to eat real food each day.