salt
1 pound Earthbound Farm Organic Collard Greens (ribs trimmed and discarded, leaves sliced into 1/2-inch wide ribbons, about 8 to 9 cups)
1 bunch Earthbound Farm Organic Mustard Greens (ribs trimmed and discarded, leaves sliced into 1/2-inch wide ribbons, about 6 cups)
4 ounces thick-sliced bacon (cut into 1/2-inch-wide pieces)
1 cup Earthbound Farm Organic Yellow Onion (cut into 1/4-inch dice)
1/4 teaspoon red pepper flakes (or to taste)
2 cloves Earthbound Farm Organic Garlic (finely minced)
1 cup good-quality chicken stock
1 tablespoon fresh lemon juice
  Freshly ground black pepper (to taste)