Step 1

Combine vegetable oil, chili powder, oregano, garlic, onion, cumin, salt, pepper, and cayenne pepper in a large resealable plastic bag. Add chicken tenders, bell peppers, and onion; shake to mix.

Step 2

Marinate chicken mixture in the refrigerator, 30 minutes to 2 hours.

Step 3

Preheat oven to 400 degrees F (200 degrees C). Line a rimmed sheet pan with aluminum foil.

Step 4

Spread chicken mixture onto prepared pan.

Step 5

Roast in the preheated oven, stirring halfway through, until chicken is no longer pink and bell peppers soften, 15 to 20 minutes.

Step 6

Sprinkle cilantro and pour lime juice over chicken mixture; toss to distribute.