Step 1

Heat the oven to 350 degrees. Spray a 9-inch square baking dish with cooking spray.

Step 2

Mix the dip mix and sour cream in medium bowl. Whisk in the chicken stock. Pour 1/2 cup of the sour cream mixture in the bottom of the baking dish.

Step 3

Layer 4 tortillas over the sauce in the dish, overlapping. Top the tortillas with 1/2 of the chicken.

Step 4

Spoon 1/3 of the tomatoes with the green chilies over the chicken. Sprinkle the tomatoes with 1/3 of the cheese. Repeat the layers and top with the remaining tortillas, tomatoes and green chilies.

Step 5

Pour the remaining sour cream mixture over the top of the casserole. Let the casserole stand for 5 minutes. Sprinkle the casserole with the remaining cheese.

Step 6

Bake for 35 to 40 minutes or until bubbly and cheese is melted and browned. Let the casserole stand for 5 minutes before serving to make slicing easier.