1 tablespoon olive oil
1 cup white onion, chopped
2 cloves garlic, chopped
1 serrano chile, seeded & minced
½ cup corn
2 Roma tomatoes, chopped
½ cup zucchini, chopped
6 cups chicken broth, heated
¼ cup cilantro, chopped
¼ cup fresh key lime juice
1 cup cooked chicken, shredded
salt to taste