Preheat oven to 375 degrees F. In a medium bowl, mix maple syrup, olive oil, Cinnamon Bark EO, Black Pepper EO, and salt to create a glaze. Add the sweet potatoes to the glaze and stir until evenly coated. Line a large rimmed baking sheet with parchment paper. Arrange the sweet potatoes onto the baking sheet lined with parchment paper. Place the baking sheet into the preheated oven and roast for approximately 25-30 minutes, turning the sweet potatoes halfway through.