Fry the bacon in a dry saucepan. Add onion and saute in the bacon fat until transparent. Add garlic and briefly fry. Add the wine and simmer a few minutes until wine has almost evaporated.
Add potatoes and chicken stock. Simmer 10 minutes or until the potatoes are just becoming tender.
Remove the thick stalks of the kale and chop the leaves into bite-sized pieces. Add to the soup and simmer 10 more minutes. Pour in the cream, season with salt and pepper and serve hot.