Turn on oven to 350. Smash all tortilla chips right there in bag. Pour into a large mixing bowl. Add everything else.
Make sure that all chips have moisture on them, if they are not all covered use anything you have handy to get them moist - another tomato, some veggie broth, V-8, white wine, more salsa, sure even a little water... just make sure there is ample wetness to the chips.
Transfer to a baking dish, sprinkle with soy cheese, cover and bake for about 25 minutes.
You can also make this in the morning then store it in the fridge until that evening, then just bake it a bit longer when you cook it as it will be cold.