I only garnished my soup with tortilla strips, but a lot of people like avocado and/or cheese as well. I’ve never really caught on to the avocado-in-soup thing, but to each her own.
3 tablespoons olive oil
Heat oil in a large saucepan over medium heat. Saute garlic, onion and tortillas for about 5 minutes. Add the rest of the ingredients and bring to a boil. Lower heat and simmer for 30 minutes, stirring frequently. Blend with an immersion blender until smooth. (you can also blend in batches using a countertop blender)
Garnish with your choice of ingredients and enjoy!