Trim the collard greens off the stems, roll, and slice into large chiffonade
Salt the greens liberally and set aside
In a large pot over medium heat, render the fat from the bacon or salt pork, stirring until the meat is crispy
Add the onions and sweat them out until the onion begins to become translucent .
Add the collard greens and with your tongs turn and twist to coat well with the fat. As the greens wilt add more until they are all in the pan.
Pour in the vinegar to deglaze the pan, stirring up any bits that are stuck on the bottom of the pan. Continue to cook, reducing the vinegar to almost dry
Add the garlic, honey, red pepper flakes, and stock. Bring it up to a boil, then reduce to a simmer and allow to cook until the stock is reduced and the greens are tender.
Taste and adjust seasoning, adding honey to balance any strong acidity from the vinegar.