Preheat oven to 425F degrees.
Grate or spiralize potatoes with skin left on.
Dunk prepped potatoes in cold water, drain, and pat dry on a dish cloth.
Line approx 10"x15" rimmed baking sheet with parchment paper or silicone baking sheet. Spread out potatoes on pan.
In bowl, melt butter and stir in olive oil, lime juice, chili powder, salt and garlic powder, parsley. Drizzle over potatoes and toss around with spoon or hands. Spread potatoes back out into even layer.
Bake for 30 to 40 minutes (WITHOUT stirring or flipping), or until browning. If you would like them extra, extra crispy, turn OFF oven and let pan sit in oven for another 10-15 minutes.