Mother in Laws and Coleslaw

This is my Mother in Laws recipe she would fix all the time. I learned a long time ago some of the best recipes are from old style cooks. She was the oldest of 8 kids and helped raise them all including feeding, cooking meals,changing the diapers and teaching them in class when she became a school teacher in a 1 room school house. I am not educated well in the world of slaw and thought ok so it is coleslaw. Well since that time I have made this recipe for someone around here at a function and they just raved about it and called it the Czech Coleslaw recipe. My mother in law Beulah never called it anything like that. From what I can tell what is supposed to be special about it is that it is kind of pickled and will store in the frig. for a week or more.
   Daughter just requested the recipe since she has cabbage in her garden the size of basketballs.
So here it is...........

Put in a bowl.... chopped to the texture you like (she used a blender)
1 head cabbage
1 onion
1 bell pepper
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Sprinkle on top of ingredients in bowl
1 cup sugar

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Boil these items and stir into the cabbage mixture. Place in fridge overnight for best flavor.
1 T. mustard seed
1 T. celery
1 T. salt
1 c vinegar
3/4 c. oil

Ranchmama
(who had the best mother in law in the world)