Caldo verde is a popular soup from Portugal, consumed by most Portuguese families at home, but it is also served in some upscale restaurants. It is usually made with a combination of potatoes, collard greens, olive oil, and a dash of salt, although there are some regional variations.
Traditionally, caldo verde is served with boiled and sliced chorizo sausage, although other types of meat can be used instead of it. In the north of Portugal, people sometimes use kale instead of collard greens. The dish originated in a former province called Minho, between 1936 and 1976.