Ingredients
Equipment
Method
Step 1: Prep the Steak & Veggies (and Marinate!)
- First, grab your sirloin steak or flank steak and slice it into ½ inch strips. Remember, the secret to tender steak is to always slice against the grain! If you find slicing a bit tricky, try par-freezing the steak for 10-15 minutes—it makes getting those uniform slices so much easier.
- In a medium bowl, combine the sliced steak with 2 tablespoons of olive oil, 2 tablespoons of taco seasoning, and the fresh juice from half a lime. Use your hands to really get in there and ensure every strip of steak is evenly coated.
- Let this marinate for at least 30 minutes to infuse that deep flavor, or for up to 2 hours if you have the time.
- While your steak is marinating, thinly slice your large onion and bell peppers. Uniform slices will help everything cook evenly.
Step 2: Initial Vegetable Roast (The Flavor Secret!)
- Preheat your oven to 400°F (200°C) and make sure to line a baking sheet with aluminum foil for the easiest cleanup ever.
- Place only the thinly sliced onions and bell peppers on the prepared baking sheet. Drizzle them with a little extra olive oil and a pinch of taco seasoning.
- Pop the pan into the preheated oven and roast for 5-7 minutes. This initial roast is vital because it allows the vegetables to release their moisture and begin to soften and caramelize, preventing them from becoming soggy once the steak is added.
Step 3: Combine Steak & Finish Roasting
- After the initial vegetable roast, carefully remove the sheet pan from the oven. The veggies should be slightly tender and fragrant.
- Now, add your marinated steak strips to the sheet pan, distributing them evenly among the partially roasted vegetables. It's crucial to ensure all ingredients are in a single layer to promote roasting rather than steaming.
- Place the remaining lime wedges on the pan alongside the steak and veggies.
- Return the sheet pan to the oven and cook until the vegetables soften and the steak is browned on the outside, which will be approximately 10-12 minutes depending on your desired doneness. Listen for that delicious sizzle and watch for the beautiful browning on the steak!
Step 4: Quick Broil for Char & Serve!
- For that irresistible restaurant-style char and extra layer of flavor, turn your oven to broil (on the high setting) for the last 2-3 minutes of cooking, or for 8-10 minutes if you prefer a more intense char. Keep a close eye on it, as broilers can work quickly, to achieve a desirable char and color on both the steak and veggies without burning. You'll hear the delightful sound of sizzling fajitas!
- Once cooked to perfection, remove the pan from the oven.
- Squeeze the cooked lime wedges over the steak and vegetables – this adds a final bright burst of flavor.
- Serve immediately with warmed tortillas, salsa or desired toppings. The colors will be vibrant and the aromas will be incredible!
Nutrition
Notes
For the best tender steak, always slice against the grain. Don't overcrowd the sheet pan to ensure even browning and prevent steaming. This recipe is highly customizable; feel free to swap steak for chicken or shrimp, or add extra veggies like mushrooms or zucchini. Nutrition information is estimated based on common ingredients and serving sizes and may vary.