Pool Room Slaw

I have had this receipe for years and I got it from a friend of mine who lived in Fayetteville, TN. There was a resaturant there that served this slaw. It is delicious on hot dogs and it makes a lot of slaw so it could be cut in half.
 
1 gallon chopped cabbage (3-4 heads)
3 large onions chopped fine
1 cup apple cider vinegar
4 1/2 cups sugar
1 Tablespoon black pepper
1 Tablespoon salt
1 quart yellow mustard
 
Put all ingredients in a pan and bring to a boil. Put in stearlized jars and seal.
 
Enjoy!

That really looks good, and it's a heck of a lot of slaw, SassyGritsAL!  Thank you for sharing it.