01 - In a large pot over medium heat, sauté diced onion and minced garlic until softened and fragrant.
02 - Stir in chicken broth, diced tomatoes with their juices, shredded chicken, and chili powder.
03 - Bring the mixture to a boil, then reduce heat and simmer uncovered for 20 minutes.
04 - Ladle hot soup into bowls and top each serving with tortilla strips, avocado slices, and a wedge of lime.