Pieper Coleslaw

I have had this written on a sticky note several times and just wanted to put it in here so that I can remember it forever! Mom's Coleslaw is my favorite:)

1/4 c. sour cream
2 c. shredded cabbage
2 T. mayonaise
1/4 t. seasoned salt
1/4t. dry mustard
dash of pepper
1/2 onion, minced (less if it's a really powerful onion)
1/4t. dill
1 tomato seeded and diced

This may appear a little dry at first, but after 15 minutes, it is perfectly moist. We have also used greek yogurt in place of sour cream.