In a large pot or dutch oven, heat 3 tbsp olive oil. On medium low heat, add onions, celery and carrots and cook for 10 minutes or until onions start to brown. Add the garlic and cook for 30 seconds. Add the chicken stock, tomatoes, jalapeño, cumin, coriander, 1 tbsp salt (less depending on the saltiness of your chicken stock), and 1 tsp pepper.