Preheat your oven to 400°F (200°C). Line a large baking sheet with parchment paper for easy cleanup. Spread the cubed sweet potatoes evenly on the sheet and drizzle with olive oil. Sprinkle with salt, black pepper, and cinnamon (if using). Toss to coat and arrange in a single layer.

Step 2: Roast the Sweet Potatoes

Roast the sweet potatoes for 20-25 minutes, flipping them halfway through, until they are tender and caramelized on the edges.

Step 3: Make the Maple Dijon Glaze

While the sweet potatoes are roasting, whisk together the maple syrup, Dijon mustard, apple cider vinegar, soy sauce, garlic powder, and red pepper flakes (if using) in a small bowl.

Step 4: Toast the Pecans

In a dry skillet over medium heat, toast the chopped pecans for 2-3 minutes, stirring frequently, until fragrant. Remove from heat and set aside.

Step 5: Coat with Glaze

Remove the sweet potatoes from the oven and drizzle the maple Dijon glaze over them. Toss gently to coat evenly. Return to the oven for an additional 5 minutes to allow the flavors to meld.

Step 6: Garnish and Serve

Transfer the roasted sweet potatoes to a serving dish. Sprinkle with toasted pecans and fresh parsley if desired. Serve warm and enjoy!