Heat vegetable oil over medium-low in small saucepan.
Add in flour and chili powder and stir for a couple of minutes.
Add in tomato sauce, water and spices and cook for 10-12 minutes or until it reaches a thick sauce consistency.
Spoon some enchilada sauce into the bottom of a 13x9 pan. Add a layer of flour tortillas on to bottom of the pan. Top with a half of the pork and half of the pinto beans. Sprinkle ⅓ of the cheese on top of that, and add on ⅓ of the enchilada sauce. Add a second layer, and then top that with flour tortillas, enchilada sauce and cheese.