ONYX
Performance
Choose your language

Train in your language.

Pick a language — the entire site loads pre-translated so you never wait.

"Train hard. Train smart."

Change language anytime from your profile settings

Sheet-Pan Chicken FajitasMeal Prep
High ProteinGluten FreeDairy Free

Sheet-Pan Chicken Fajitas

One pan, one cutting board, four servings of meal-prepped protein heaven.

Prep

10m

Cook

25m

Total

35m

Servings

4

kcal

425

Protein

42g

Carbs

32g

Fat

14g

Macros per serving

Overview

Why it works

The single best meal-prep recipe in the library. Slice, season, roast - four servings of fajita filling that pivot into burritos, bowls, salads or lettuce wraps all week.

  • Chicken thigh stays juicy after reheating - far more forgiving than breast for meal prep.
  • High-heat roasting caramelizes the peppers and onions for restaurant-grade flavor.
  • Built-in macro flexibility - you control the carb (rice, tortilla, lettuce, none).

Ingredients

Ingredients · 4 servings

Sheet pan

  • 700 g boneless skinless chicken thighs, sliced
  • 2 red bell peppers, sliced
  • 2 green bell peppers, sliced
  • 1 yellow bell pepper, sliced
  • 1 large red onion, sliced

Seasoning

  • 2 tbsp olive oil
  • 1 tbsp smoked paprika
  • 2 tsp cumin
  • 1 tsp chili powder
  • 1 tsp garlic powder
  • 1 tsp onion powder
  • 1 tsp salt
  • Juice of 1 lime

To serve (your choice)

  • Whole-wheat tortillas, rice, or lettuce cups
  • Greek yogurt or sour cream
  • Salsa, avocado, fresh cilantro

Instructions

Step by step

  1. 1

    Preheat oven to 230 °C / 450 °F.

  2. 2

    Toss chicken and vegetables with oil and all seasoning on a large sheet pan in one layer.

  3. 3

    Roast 20 minutes, stir, roast another 5 minutes until vegetables char at the edges.

  4. 4

    Squeeze lime over the hot pan.

  5. 5

    Serve immediately or portion into 4 containers for the week.

Pro Tips

Coach-level details

  • Use two sheet pans if it looks crowded - overcrowding steams instead of roasts.
  • Save pan juices and pour over your reheated portions during the week.
  • Try the broiler for the last 2 minutes for a stronger char.

Storage & Swaps

Keep it, swap it, save it

Storage

  • 4 days refrigerated.
  • Reheats best in a skillet, 4 minutes covered, then 1 minute uncovered.
  • Label containers with the prep date.

Smart swaps

  • Swap chicken thigh for breast (reduce cook time 5 min), shrimp, or extra-firm tofu.
  • Add 1 tsp chipotle in adobo for smoky heat.
  • Mexican rice base for cutting macros, cauliflower rice for low-carb week.

Pair with a program

Eating right is half the result.

Plug this recipe into an Onyx program for the other half - periodized training that actually moves the needle.

Browse programs