Preheat oven to 375 degrees Fahrenheit
Wash and scrub sweet potatoes thoroughly to remove any dirt
Using a mandolin slicer, cut the sweet potatoes into thin slices (the thinner they are, the crispier they will be)- If you do not have a mandolin slicer, you can use your knife but will take a lot longer and will not be as precise
Once the sweet potatoes are thinly sliced, toss them with the olive oil and salt in a bowl
Line a baking sheet with aluminum foil and place a baking rack on top, if you are using one
Place each sweet potato slice onto the baking rack, making sure not to stack them
Bake for about 25-30 minutes or until crispy