Isn't Kale this vegetable or do I get this wrong.
Kale is vegetable that is considered to be closer to wild cabbage than most domesticated forms of "Brassica oleracea".
How can you use Kale in a receipe. 
Yes, it can be used in salad
What else can you make with Kale?
was easy to grow and inexpensive, and could desalinate soil. For most of the twentieth century, kale was primarily used in the United States for decorative purposes; it became more popular as an edible vegetable in the 1990s due to its nutritional value.
During World War II, the cultivation of kale (and other vegetables) in the U.K. was encouraged by the Dig for Victory campaign. The vegetable was easy to grow and provided important nutrients missing from a diet because of rationing.
Cultivation.
Kale is usually
Kale
Kale () or leaf cabbage is one of certain cultivars of cabbage ("Brassica oleracea") grown for their edible leaves, although some are used as ornamentals. Kale plants have green or purple leaves, and the central leaves do not form a head (as with headed cabbage). Kales are considered to be closer to wild cabbage than most of the many domesticated forms of "Brassica oleracea".
Etymology.
"Kale" originates from Northern Middle English "cale" (compare Scots "kail