Heat a Dutch oven over medium-high heat. Add oil to pan; swirl to coat. Add onion and next 6 ingredients (through garlic); cook 6 minutes or until carrot is crisp-tender, stirring occasionally. Add broth, hominy, and tomatoes; bring to a boil. Cover and cook 6 minutes, stirring occasionally. Add shrimp; cook 2 minutes or until shrimp are done.

Remove from heat; stir in juice and salt. Divide shrimp mixture evenly among 4 bowls; top evenly with chips and avocado. Garnish with cilantro, if desired.