Japanese (plaster like mustard plaster popaino)

Description

5 ounce Soto Imo (Japanese potato)
2 ounce ginger root
5 ounce flour
2 ounces salt

Wash peelings off of potato with gloves on or it will make one itch. Bake on charcoal fire. After baking potato grade potato, grade ginger, mix the potatoes, ginger, flour, salt, make paste. If paste too hard add vinegar to the mixture. Put on gauze and apply where the pain is.