Using a large heavy stock pot (I use my 6 quart porcelain coated cast iron dutch oven), melt 1 stick of butter (½ cup) in the bottom of the pot over medium heat.
Cut up 6 strips of thick bacon into 2 inch pieces. Add to the melted butter. Cook until done.
Add 1 onion, chopped small, and cook in the fats until translucent. Add the garlic and heat for 1 minute.
After sauteing the garlic for 1 minute, add the greens a few at the time, allowing them to wilt as you go.
Once the greens are all in the pot, Add 1- 32 oz box of chicken stock. Add smoked turkey neck.
After the the greens come to temp, have wilted down in the pan, Add 1 teaspoon chicken stock concentrate, ¼ cup cider vinegar, 2 teaspoon sugar, 1 teaspoon pepper, ¼ teaspoon red pepper flakes. Give everything a good stir.
Put the lid on and set the stove on low. Check and stir every 30 minutes or so. Add more stock if needed. After 2 hours the greens should be done, tender and flavorful