Standard way to make crispy sweet potato fries

I've been looking for a way to fry (not bake) sweet potatoes, maybe like the double-fry method for russet and russet-like potatoes, to get a crispy exterior.

Maybe I'm missing something but I'm having difficulty finding something for sweet potatoes (of any kind). I've consulted my cookbook library, and I haven't come across much. I've had mixed experiences with blog recipes, so I trust them less, but maybe this Munchies single-fry-from-frozen sweet potato fries article (which I will try this weekend) has some truth to it?:

• Ingredients:

  • 2 pounds large orange-fleshed sweet potatoes
  • 1 teaspoon baking soda
  • 1 cup plus 2 tablespoons cornstarch
  • Peanut oil, for frying
  • 1 cup clubsoda or water Kosher or fine sea salt

• Instructions:

  1. Line a baking sheet with parchment paper and make enough room in the freezer for said baking sheet.

  2. Peel the sweet potatoes, if desired, and cut them lengthwise into 1/4-inch-thick batons (fry shapes). Place them in a bowl with the
     baking soda and 2 tablespoons cornstarch, and toss. Arrange the sweet
     potatoes on the baking sheet in a single layer, making sure they are
     not touching. Freeze them until rock hard, at least 3 hours. If making
     fries later, transfer to a gallon-size zip-top freezer bag; they will
     keep frozen for up to 2 weeks.

  3. Pour the oil into a large, heavy pot, preferably a Dutch oven, that's fitted with a deep-fry thermometer to a depth of 2 inches. Set
     the pot over medium heat and begin gently warming the oil to 375ºF.

  4. In a large bowl, whisk together the remaining 1 cup cornstarch and the club soda. Stack several layers of brown paper on a baking sheet.

  5. When the oil reaches 375ºF, drop a handful of sweet potatoes into the cornstarch mixture and coat evenly. Lift them from the bowl,
     letting any excess drip into the bowl, and carefully add them to the
     oil. Fry, stirring with a spider so they do not stick to the bottom of
     the pot, until deep golden brown and cooked through, about 8 minutes.
     Using the spider, transfer the fries to the brown paper to drain.
     Immediately season with salt. Repeat with the remaining sweet
     potatoes, returning the oil to 375ºF between batches.

I'm looking for validation or refutation of the instructions of that article or, better yet, tried methods from people here that result in crispy sweet potato fries.