Preheat the oven to 400 F. Line a baking sheet with parchment paper.
Slice the sweet potatoes into 1/4" to 1/3" slices. Lay flat on the prepared baking dish. Drizzle with olive oil and sprinkle salt and pepper on top.
Roast in the preheated oven for 25 to 30 minutes, or until completely softened.
While the sweet potatoes are roasting, mix together themelted butter and maple syrupin a smallbowl. With about 5 minutes left in the roasting time, brush the glaze over the sweet potatoes and sprinkle a few dashes of cinnamon over the top. Return to the oven for 5 more minutes of roasting.
Serve Glazed Sweet Potato Rounds, as holiday side dish or winter snack!