1. Preheat the oven to 350 degrees.
2. Prepare a large baking dish by spraying with a nonstick cooking spray.
3. In a large skillet, place the meat over medium heat.
4. Brown the meat making sure to break it up while cooking. Drain the meat and return it to the skillet.
5. Add the milk, seasoning, soup and chilies.
6. Stir together well.
7. Now in the baking dish you've prepared, place a layer of chips on the bottom.
8. Then cover the chips with half of the meat mixture.
9. Sprinkle with half the cheese.
10. Repeat the layers one more time. (layer of chips, remaining half of meat, remaining half of cheese.)
11. Bake 30 minutes or until the cheese has completely melted and the casserole is heated completely through.
12. Serve with the sour cream and guacamole.
I'm always looking for new ways to serve tacos. For instance, tacos are too messy in their traditional form for a potluck, so this is a very good way to solve that problem. I like to add some tortilla chips in a bowl alongside the casserole just to add a little crunch if desired.