Mix the roast with tomatoes and green chilies and 1 1/2 cups of cheese.
Stir enchilada sauce, tomato sauce, garlic powder and salt and pepper together in a bowl.
Spray 9x13 casserole dish with cooking spray.
Add a spoon of sauce to the bottom and spread around.
Fill tortillas with meat, roll and place seem side down in the dish.
Pour remaining sauce over top.
Top with cheese.
Bake at 350 degrees for 20-30 minutes, until hot and bubbly.