Heat oven to 375. Spray a 9×13 baking dish with cooking spray.

Heat carnitas according to package directions. Place carnitas, including any juice, in a mixing bowl. add green sauce and sour cream ; stir to combine.

Spread tortillas pieces over bottom of dish. Layer beans and hominy over tortillas. Spoon sauce mixture over top; sprinkle with cheese.

Cover with foil and bake 20 minutes or until casserole is hot and bubbly. Remove from oven.