Step 1

Preheat oven to 375 degrees and lightly grease a large sheet pan. Stir together garlic powder, chili powder, cumin, and cayenne pepper.

Step 2

Arrange chicken breasts on the pan, drizzle with 2 tablespoons olive oil and rub in with your fingers on both sides. Season generously with salt on both sides, then season chicken with mixed spices on both sides.

Step 3

Arrange sliced peppers and onions on the pan around the chicken breasts. Drizzle with remaining 2 tablespoons olive oil. Season generously with salt.

Step 4

Bake for 15-20 minutes until chicken is cooked through. Transfer chicken to a cutting board, return peppers and onions to the oven and switch to BROIL for 3-5 minutes until the edges of the veggies start to char slightly, then remove from oven.

Step 5

While veggies are broiling, drizzle fresh lime juice over chicken then thinly slice into strips.

Step 6

Assemble fajitas with chicken, peppers, onions, and desired toppings and serve immediately.