Grate the Onions on a box grater.
Shred the potatoes in your food processor with the shredding attachment.
Place the potatoes in a bowl of ice water and allow them to soak for ten minutes.
Remove the potatoes and wring dry in a clean towel.
Combine all the ingredients together and form the pancakes.
Heat vegetable oil in a large cast iron skillet (or comparable pan) on medium high heat.
When the oil is hot, test it with a small piece of potato. If it sizzles, the oil is hot enough, carefully add the pancakes one at a time to the pan.
Fry the pancakes for two minutes per side.
Set the pancakes aside on a paper towel lined plate.