Check leaves of greens carefully; remove pulpy stems and discolored spots on leaves. Wash thoroughly in several changes of warm water; add a little salt to the last rinse. Put greens in colander to drain. Cook salt pork, covered, about 10 minutes in 1/2 cup boiling salted water. Add greens, a few at a time; cover and cook slowly until greens are tender. Do not overcook. Serve with vinegar. NOTE: An alternate method is to wash greens carefully and put them into a large cooker with only the water that clings to leaves. Add salt and bacon drippings after the greens have cooked tender. SOURCE: Southern Living Magazine, April, 1974. Posted to MM-Recipes Digest V4 #082 by Simps on Mar 22, 1997