After shredding the potatoes, place them in a strainer. Use the back of a rubber spatula press the excess water out of the potatoes.
Place the potatoes on a double thickness of paper towel and pat as dry as possible.
Place the potatoes in a bowl and add the salt, sage and pepper. Toss until well blended.
Place the butter on a large griddle or in a large skillet over medium high heat.
When the butter is melted and bubbling add the potatoes.
Toss well on the griddle for about 5 minutes and then gather them together into two piles.
Press down to flatten each pile.
Adjust the heat so that the potatoes cook slowly without burning – generally medium to medium-high.
After about 5 minutes turn and cook on the other side for 3 to 5 minutes.
Serve.