Preheat your oven to 425°F (220°C). Line a baking sheet with parchment paper or aluminum foil for easier cleanup, if desired.
Wash and dry the sweet potatoes. Using a sharp knife, slice the sweet potatoes into thin rounds, about 1/4-inch thick. Try to make the slices as uniform as possible for even baking.
In a mixing bowl, combine the olive oil, salt, black pepper, and any optional seasonings of your choice. Toss the sweet potato slices in the seasoning mixture, ensuring that they are well coated.
Place the seasoned sweet potato slices in a single layer on the prepared baking sheet. Avoid overcrowding the slices, as this can hinder proper browning and crispness.
Place the baking sheet in the preheated oven and bake for 25-30 minutes, or until the slices are tender and slightly crispy around the edges. Flip the slices halfway through the baking time for even browning.
Once baked to your desired texture, remove the sweet potato slices from the oven and let them cool slightly. Serve them as a side dish alongside your favorite main course or enjoy them as a wholesome snack.