Also know as Portuguese Green soup, Usually this soup is non spicy but i have an idea. Some of the recipes call for a little smoked sausage. I have some smoked sausage with jalapeno in them. It is also usually served with a type of cornbread, I was thinking some hatch chile cornbread, The sausage i have is relatively mild but it should add a tiny bit of zip. Im not sure how well it will pair with the kale.
Does it sound like its worth a shot? Ive never made Caldo Verde before.