King Ranch Chicken Casserole

Ingredients (22)

• 5 lbs chicken breasts
• Olive oil
• Kosher salt and freshly ground black pepper
• 6 tbsp unsalted butter
• 1 large yellow onion
• 1 green bell pepper
• 1 red bell pepper
• 1 jalapeño
• 2 garlic cloves
• 1 tbsp chili powder
• 1 tbsp ground cumin
• 1 tsp smoked paprika
• ¼ cup all-purpose flour
• 1¾ cup chicken stock
• 1 10 oz can Ro-tel
• 1 7.5 oz can green chiles
• 1½ cup sour cream
• ¾ cup cilantro
• 4 cups cheese
• 15 corn tortillas
• ½ cup vegetable oil
• Cooking spray