Creating the Oven-Roasted Root Vegetables with Spicy Pecan Topping can be straightforward when following these easy steps:

1. Preheat the Oven: Begin by preheating your oven to 425°F (220°C). This high temperature will help in attaining that lovely roasted finish.

2. Prepare the Vegetables: In a large mixing bowl, combine the carrots, sweet potatoes, beets, and red onion. Make sure they are cut to similar sizes for even cooking.

3. Season the Vegetables: Drizzle the olive oil over the vegetables. Sprinkle salt, black pepper, smoked paprika, and garlic powder. Toss to combine, ensuring all vegetables are evenly coated.

4. Arrange on Baking Sheet: Spread the seasoned vegetables on a large baking sheet in a single layer. This will allow them to roast evenly and achieve a caramelized finish.

5. Roast the Vegetables: Place the baking sheet in the preheated oven and roast for about 30-40 minutes. Stir halfway through for even browning. They should be tender and browned when done.

6. Prepare the Topping: While the vegetables are roasting, prepare the spicy pecan topping. In a small bowl, mix the chopped pecans, maple syrup, cayenne pepper, and cinnamon. Stir to combine.

7. Add the Topping: After the vegetables have roasted for about 25 minutes, sprinkle the spicy pecan mixture over the vegetables. Return to the oven for an additional 5-10 minutes to allow the pecans to toast lightly.

8. Finish and Serve: Once the sweet potatoes are fork-tender and caramelized, remove from the oven. Let cool for a couple of minutes before serving to allow the flavors to meld.

These clear instructions will guide you through preparing this incredible recipe smoothly and efficiently.