In a small bowl or pie plate whisk together the milk and egg.
In another small bowl or pie plate, whisk together the flour, salt, garlic salt, onion powder, pepper and poultry seasoning, if using.
Cut the potatoes into wedges. You want the wedges to be thin and uniform. Try to cut them so they are 3/8" in thickness at the center.
Lay a wire rack on top of a large baking sheet.
Working in small batches, dip the potatoes first into the flour mixture, then into the milk mixture, and back into the flour again. Transfer to the wire rack.
After all of the potatoes have been dredged let them dry for at least 10 minutes.
Meanwhile, heat oil to 350 F.
Working in batches, fry the potatoes for 5-6 minutes. They will not be quite done or golden brown. Transfer to a wire rack to drain.
Once all of the potatoes have been fried the first time, fry them again, but this time for 3-4 minutes or until golden brown and crunch delicious. Transfer to a rack to drain and cool slightly.