Preheat the oven to 380°F (190°C).
Wash the sweet potato, cut the ends off and cut out any blemishes. Peeling the sweet potato is optional.
Slice the sweet potato into evenly thick slices, lengthwise. And then cut those slices into strips. The more evenly they are sliced the better to make sure they all cook evenly.
Transfer the sweet potat onto a place. Sprinkle a little bit of salt and oil over them. With your hands, mix them up and move them around to get even coverage of oil on all the fries. You don't need a lot of oil, just a light covering is plenty. A tablespoon is probably more than enough.
Place a grid over a baking sheet or raosting pan, and transfer the sweet potato onto the grid. You want a pan underneath the grid to catch any oil drops or fries that accidentally fall through the grid.
Space the fries evently onto the grid, making sure they do not touch.
Once the oven is up to temperature, place the pan and grid in the oven and set the timer for 20 minutes.
At 20 minutes, turn the sweet potato and place in the overn for another 5 to 7 minutes. If your fries are very thick, you might need to add a few more minutes.
Once they are cooked they are ready to enjoy with your favorite condiments and protein.