Season Chicken – Rub butterflied breasts with 1 tablespoon olive oil and the jerk seasoning; let stand while the oven heats.
Pre-Roast Veggies – Heat oven to 475 °F. On a rimmed sheet tray toss peppers and onion with the remaining 1 Tbsp oil, salt and pepper. Spread in a single layer and roast 6–7 minutes, just until the edges start to caramelize.
Add Chicken, Finish Roasting – Lay the jerk-seasoned chicken directly over the hot vegetables. Return the tray to the oven and roast 10–12 minutes, flipping once, until the thickest part of each breast reaches 165 °F.
Rest & Slice – Transfer chicken to a board; rest 5 minutes, then slice cross-grain into ½-inch strips.
Build Platter – Arrange sliced chicken back on the board, layering peppers and onions over and around for that fajita “stack” or layered.
Serve – Bring the board to the table with warm tortillas, lime wedges, and your favourite toppings.
Video
Notes
Why 475 °F Keeps Chicken Juicy
The higher heat sears the exterior quickly, shortens oven time and lets the chicken reach 165 °F before moisture has a chance to evaporate—so you get charred veggies and extra-moist meat.