Mexican Chicken Casserole

Bahan-bahan (8 porsi)

• 2 lbs chicken breasts ((4 small or 3 medium))
• 1 tsp salt (or to taste)
• 1/4 tsp black pepper (or to taste)
• 8 oz shredded Mexican cheese ( divided)
• 1 cup sour cream ((full fat))
• 14 oz diced green chilis (two 7 oz can with their juice
• 1 small avocado (diced)
• 1 roma tomato (diced)
• 2 Tbsp cilantro (chopped)