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Whole30 sheet pan steak fajitas with peppers and lime on a foil tray.

Whole30 Sheet Pan Steak Fajitas

These Whole30 sheet pan steak fajitas are your new go-to for quick, healthy, and flavor-packed dinners. Made with clean, Whole30-compliant ingredients, this one-pan recipe features juicy steak, colorful peppers, and bold seasoning—perfect for busy weeknights or meal prep.

  • Total Time: 30 minutes
  • Yield: 4 servings 1x

Ingredients

Scale
  • 3 bell peppers, stemmed, seeded, and cut into thin slices
  • 1 red or yellow onion, halved and cut into thin slices
  • 4 tablespoons olive or avocado oil (divided)
  • 2.5 tablespoons taco or fajita seasoning (divided, Whole30-compliant)
  • 1.5 lbs sirloin or flank steak, cut into thin ½-inch strips
  • 1 lime, cut into wedges

Instructions

  1. Preheat the oven to 400°F. Line a large-rimmed sheet pan with foil.
  2. Add peppers and onion to the sheet pan. Drizzle with 2 tablespoons of oil and toss to coat. Sprinkle with ½ tablespoon of fajita seasoning and toss again.
  3. Move veggies to the sides of the pan to make room in the center for the steak.
  4. Place steak strips in the center. Drizzle with remaining 2 tablespoons oil, sprinkle with remaining seasoning, and toss to evenly coat.
  5. Squeeze half a lime’s juice over the steak for extra flavor.
  6. Bake at 400°F for 10 minutes.
  7.  Stir the steak to prevent overcooking any overlapping pieces.
  8. Broil on high for 5-10 more minutes until steak is browned and veggies are tender (watch closely!).
  9.  Remove from oven, drain excess juices, and let the steak rest for 5 minutes.
  10.  Serve hot with lime wedges and your favorite Whole30 toppings.
  • Author: Lily
  • Prep Time: 10 minutes
  • Cook Time: 20 minutes
  • Category: whole 30meal recipes
  • Method: Sheet Pan, Oven
  • Cuisine: Mexican
  • Diet: Gluten Free

Nutrition

  • Serving Size: Per Serving
  • Calories: 365
  • Sugar: 3g
  • Fat: 24g
  • Carbohydrates: 6g
  • Fiber: 3g
  • Protein: 32g