Southern Style Collard Greens

Ingredients:

2 sweet onions, finely diced
2 smoked ham hocks
4 garlic cloves, minced
6 cups chicken broth (enough to cover)
2 lbs collard greens (packaged or fresh, cleaned and trimmed)
2 tbsp apple cider vinegar
2 tbsp sugar
Salt and black pepper to taste
(Optional: a pinch of cayenne for a spicy kick)
Instructions: