Heat a Dutch oven over medium heat, then add the ground beef. Add all the taco seasonings and mix into the ground beef, making sure to break it up into crumbles.
Add the diced onion, then mix thoroughly and cook for 4-5 minutes.
Add garlic, and cook, stirring constantly for 1 minute.
Add the beans, tomatoes, green chilies, corn, and ranch dressing packet, mix well, then cover and simmer on low for 2 hours, stirring occasionally.
Meanwhile, preheat the oven to 400 degrees. Coat a baking sheet with avocado cooking spray.
Cut a few corn tortillas into strips. Place them on the baking sheet in a single layer, spray them with avocado cooking spray, then season with sea salt to taste.
Coat a baking sheet with cooking spray, then place the tortilla strips on it, and spray them with avocado cooking spray and season with sea salt.
Bake in the oven for 5-7 minutes or until golden brown.
Ladle the soup into bowls, then top with corn tortilla strips, sour cream, cheddar cheese, and green onions. Enjoy.