Corn tortillas help make this soup thick and hearty, and they also act as a crunchy garnish. Slideshow: More Fast Soups
In a large pot, heat the oil. Add the onion, poblanos, garlic and cumin and season with salt and pepper. Cover and cook over moderate heat, stirring occasionally, until the onion is softened, about 5 minutes. Add the broth and tortilla strips, cover and bring to a boil. Simmer over moderately low heat for 5 minutes. Add 1/4 cup of the cilantro and, using an immersion blender, puree the soup until smooth. Add the meat and fresh corn and simmer for 5 minutes.
In a mini food processor, puree the sour cream with the remaining 2 tablespoons of cilantro. Ladle the soup into shallow bowls and garnish with the cilantro crema, cilantro leaves and tortilla chips.