Heat olive oil in a large pot over medium heat.
Add chopped onion and cook until translucent.
Add minced garlic and cook for another minute.
Add chopped bell peppers and cook until softened.
Add shredded chicken, ground cumin, and chili powder. Stir well.
Pour in chicken broth and bring to a boil.
Add diced tomatoes, black beans, and corn. Reduce heat and simmer for 20 minutes.
Stir in lime juice and season with salt and pepper to taste.
Serve hot, garnished with tortilla strips, chopped cilantro, and sliced avocado.