Creating Louisiana Voodoo Fries is straightforward. Follow these steps to achieve delicious, spicy perfection:

1. Preheat Oven: Start by preheating your oven to 425°F (220°C).
2. Prep Potatoes: Wash and peel the russet potatoes. Cut them into thin fries or wedges, depending on your preference.
3. Season Fries: In a large bowl, toss the potato fries with olive oil, Cajun seasoning, salt, and pepper until well coated.
4. Arrange on Baking Sheet: Spread the fries in a single layer on a baking sheet lined with parchment paper.
5. Bake Fries: Bake in the preheated oven for 20-25 minutes, or until golden and crispy. Remember to flip them halfway through for even cooking.
6. Add Cheese: Once the fries are cooked, sprinkle shredded cheddar cheese over them. Return to the oven for an additional 3-5 minutes, allowing the cheese to melt.
7. Prepare Toppings: While the fries are baking, slice the green onions and set aside.
8. Serve: Remove the fries from the oven and drizzle with sour cream. Top with sliced green onions for freshness and crunch.