Slice sweet potatoes into desired shape (wedges, fries, rounds)
Soak in coldest water you can get for at least 20-40 minutes
Preheat oven to 425 degree F
Line a baking sheet with parchment paper
Once potatoes are done soaking, lay on top of a clean towel or a few slices of paper towel. Pat dry.
Either put potatoes back in dry bowl, or lay on baking sheet. Pour oil, salt and pepper over. Toss to evenly coat potatoes.
Distribute evenly across baking sheet, making sure that each piece has a little room around it. You don't want to crowd them because the potatoes will steam instead of bake.
Bake for 10-15 minutes or until bottom is slightly golden, then flip over each piece.
Bake additional 10-15 minutes or until crispy and golden.