01 - Set oven to 425°F (220°C). Line a large baking sheet with parchment paper.
02 - Place sweet potato rounds in a single layer on the prepared baking sheet.
03 - Drizzle potatoes with olive oil. Sprinkle with salt, black pepper, and cinnamon if using. Toss until evenly coated and spread into a single layer once more.
04 - Roast for 25 to 30 minutes, flipping halfway through, until golden and fork-tender.
05 - Remove from the oven and immediately drizzle with honey. Allow to rest for 2 to 3 minutes so honey permeates the potatoes.
06 - Transfer to a serving platter. Garnish with chopped parsley if desired. Serve warm.