I have been doing shredded potatoes in our waffle iron for a while now with excellent results. I just take a couple of medium potatoes and run them through my cheese grater, squeeze out the excess liquid and make balls the size of a large meat ball. A little olive oil on a paper towel to lube the waffle iron and then just place the potato balls on the iron and squeeze it closed.
Actual waffles take 6 minutes on our small, 2 waffle iron so I usually leave the potatoes on for about 10. They come out crispy and delicious. Try topping them with sour creme or Ranch Dressing. I do add a little salt, pepper, garlic powder and basil also works well with potatoes.
:C