Monstrous Mash

Directions

1. 1
   Chop onions (including green )tops very finely.
2. 2
   Add vinegar to chopped onion and marinate 30 minutes.
3. 3
   Combine buttermilk and mustard, heat and mix well.
4. 4
   Add chopped onion to mustard mixture and allow to steep while boiling potatoes.
5. 5
   Boil potatoes in salt water as usual for mash.
6. 6
   Mash potatoes, and mix in mustard-onion mixture.
7. 7
   Season with salt to taste and serve.