Preheat the oven to 400 degrees Fahrenheit (205 degrees Celsius) and line a baking sheet with parchment paper.
Place sweet potato rounds in a large mixing bowl and toss with olive oil, salt, and pepper until evenly coated.
Arrange the rounds in a single layer on the prepared baking sheet, ensuring they do not overlap.
Roast in the center of the oven for 15 minutes.
Remove the tray and flip each round using a spatula or tongs.
Return to the oven and roast for an additional 10 to 15 minutes until the potatoes are tender and the edges are golden brown.
Remove from the oven and immediately sprinkle crumbled feta cheese over each round while warm.
Drizzle honey over the assembled rounds and garnish with fresh thyme leaves before serving.