How to Make It
Heat a Dutch oven over medium-high heat. Add oil to pan; swirl to coat. Add onion, carrot, and poblano; sauté 8 minutes. Add stock, salt, black pepper, and tomatoes; bring to a boil over high heat. Finely crush half of tortilla chips; add to stock mixture. Cover, reduce heat, and simmer until carrot is tender, about 8 minutes. Stir in cilantro and chicken. Ladle about 1 1/3 cups soup into each of 6 bowls. Divide avocado among bowls. Coarsely crush remaining tortilla chips and divide among bowls; serve with lime wedges and cilantro sprigs, if desired.