03Heat the remaining 1 teaspoons of oil in a large heavy skillet over medium heat. Add the onion and cook for 5 minutes, stirring occasionally, until onion is soft and translucent. Add the garlic, jalapeno, cumin, and oregano and cook for 1 minute more. Add the broth and tomatoes, bring to a boil, then reduce the heat to low and simmer for about 10 minutes. Stir in lime juice.04Remove the pan from the heat and puree with an immersion blender or in 2 batches in a regular blender until the soup lightens in color but chunks of tomato remain, about 30 seconds. Serve the soup topped with the tortilla strips, a dollop of sour cream, and a sprinkle of cilantro.