Easy Oven-Baked Chicken Fajitas

Chicken breasts, boneless skinless

Cilantro, fresh

Onion, large

Red bell pepper, medium

Old El Paso™ thick 'n chunky salsa

package Old El Paso™ fajita seasoning mix

Vegetable oil

Sour cream

Old El Paso™ tortillas for soft tacos & fajitas (6 inch; from 8.2-oz package)