Tortilla Soup with Black Beans

Ingredients

• 1 tablespoon olive oil
• 4 garlic cloves (minced)
• 1 teaspoon chili powder
• 2 cans diced tomatoes in juice (14 1/2 ounces each)
• 2 cans black beans (rinsed and drained, 15 ounces each)
• 1 can reduced-sodium chicken broth (14 1/2 ounces)
• 1 package frozen corn kernels (10 ounces)
• Coarse salt (to taste)
• Ground black pepper (to taste)
• 1 cup crushed tortilla chips (plus more for serving (optional))
• 1 tablespoon fresh lime juice
• Lime wedges (for serving)
• 2 cups cooked chicken (cut up (optional))
• 1 cup water