Chicken Fajita Casserole

Name: Chicken Fajita Casserole
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: American, Mexican, Latin American, TexMex
Ingredients: 1 1/2 lbs chicken breast (cubed); 2 bell peppers (deseeded and cut into strips, use red or green peppers); 1 onion (sliced); 2 Tablespoons fajita seasoning; 1 Tablespoon vegetable oil; 1 cup sour cream; ½ cup salsa; 1 ½ cups shredded cheddar cheese; *optional toppings (chopped cilantro, chopped jalapeños, sour cream, shredded cheese, salsa or pico de gallo for serving)