Preheat over to 425 F (Convection settings if you have it)
Cut ends and peel the large sweet potato
Slice in half down the middle and and cut into thin strips (try to get them as evenly as you can so they cook in the same time)
Put sweet potato into a large bowl and add cornstarch. Toss and coat fries evenly.
Pour in bowl and coat evenly
Layout the sweet potato fries onto a large baking sheet and make sure not to over crowd them. Leaving a little space between each piece of sweet potato is necessary
Bake for 10 minutes and flip the sweet potatoes and turn the pan.
Bake for another 10 minutes. Remove from oven and sprinkle with salt, pepper, garlic powder and paprika to taste!