1. Preheat oven to 375F. Coat a deep dish pie pan with cooking spray.
2. Heat leftover pork and sauce just until warm. Combine tomatoes and chorizo in a bowl. Mix well. Spread about 1/2 cup of the mixture to the prepared pan to cover the bottom. Top with 1 tortilla. Spoon one third of the remaining mixture over the tortilla. Repeat twice, topping with the fourth tortilla. . Drizzle the reserved tomato juice over the top and cover with foil.
3. Bake 20 minutes. Remove the foil, sprinkle with cheese on top and continue baking until the cheese is melted and the torta is bubbly, about 20 minutes more.
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