Preheat oven ot 425 F.
If you're using a whole jicama, peel and then slice into 1/2 inch fries (or 1/2 inch if you like thin fries).
Place jicama in a large bowl and toss with olive oil, and all the spices -- smoked paprika, garlic powder, onion powder, salt and a generous sprinkle of pepper. Toss to coat.
On a baking sheet pan, add the ghee and put pan in your oven for 1 minute, just until the ghee is completely melted. This could take less time, so keep on eye!
When the ghee is melted, add the jicama fries to the baking sheet and spread out in a single layer. Bake for about 15 minutes, then turn over and bake an additional 15 minutes. You want them to be nice and golden before flipping them over, so if they're not golden brown, wait another couple of minutes.
Now, this is the hard part! When the fries are golden brown on all sides, and let cool for a few minutes. You'll want to dig in right away, but they're hot, so I highly recommend waiting until they cool off slightly.
Serve with the spicy aioli, or a squeeze of lime juice or a sprinkle of tajin......or all 3!