Removing the spine of the greens, cut lengthwise and wash thoroughly. Cut the bacon into large cubes, place in a pan over medium high heat and cook until fat is rendered. Remove the bacon when crispy then add the onions to the bacon fat and saute for three to five minutes.
Add the garlic and the greens, cover with water. Add the sugar and ½ the vinegar along with the chili.
Cook for two hours on medium heat.
After two hours, taste for seasoning then and add the crispy bacon.