In a large mixing bowl, combine vegan chicken substitute, vegan cheese, diced tomatoes with green chilies, vegan cream of mushroom soup, vegan sour cream, chili powder, and garlic powder.
Layer half of the corn tortilla strips in the bottom of a baking dish.
Spread half of the mixture over the tortillas.
Repeat layers with remaining tortilla strips and mixture.
Bake in preheated oven for 30 minutes, until bubbly and lightly browned.
Notes:
Let the casserole sit for a few minutes before serving to allow it to set.