The great Dutch microscopist Antonie van Leeuwenhoek devoted his long life to microscopical studies and was probably the first to see and describe bacteria, reporting his results to the Royal Society of London.
Carefully spread the sweet potatoes out in a single layer on the baking sheet. (Watch out, the pan is hot!) 5 Bake: Bake for a total of 15 to 25 minutes. After the first 10 minutes, remove the baking sheet from the oven and use tongs to turn over all of the sweet potato pieces.
Bake the fries. Bake the sweet potato fries for 15 or 20 minutes. Remove the baking sheet from the oven and stir the fries, flipping them to the other side. Bake for 5 to ten more minutes, or until the fries are lightly browned and crispy around the edges.. Bake the sweet potatoes. Place the sweet potatoes directly on the rack in your oven, or on a baking sheet if you prefer. Bake for about 45 minutes, or until they feel soft inside when you poke them with a fork.