Spicy Tortilla Soup with Shrimp and Avocado

INGREDIENTS

• 1 tablespoon olive oil
• 1 cup prechopped onion
• 1/3 cup prechopped celery
• 1/3 cup chopped carrot
• 1 tablespoon minced chipotle chile, canned in adobo sauce
• 1 teaspoon ground cumin
• 1 teaspoon chili powder
• 2 teaspoons minced garlic
• 4 cups fat-free, lower-sodium chicken broth
• 1 (15-ounce) can white hominy, rinsed and drained
• 1 (15-ounce) can no-salt-added fire-roasted diced tomatoes, undrained
• 12 ounces peeled and deveined medium shrimp
• 1 tablespoon fresh lime juice
• 1/8 teaspoon salt
• 1/2 cup lightly crushed baked tortilla chips (about 1 ounce)
• 1 cup diced avocado (about 1/2 pound)
• 2 tablespoons fresh cilantro leaves (optional)