01 - Preheat the oven to 425°F. Line a large baking sheet with parchment paper.
02 - Soak the cut potatoes in cold water for at least 30 minutes to remove excess starch, then drain and pat dry thoroughly with a clean towel.
03 - In a large bowl, toss the potatoes with olive oil, smoked paprika, garlic powder, onion powder, cayenne, thyme, oregano, black pepper, and salt until evenly coated.
04 - Arrange the fries in a single layer on the prepared baking sheet.
05 - Bake for 20 minutes, flip the fries, then bake for another 15 minutes or until golden and crispy.
06 - Meanwhile, in a small bowl, mix together mayonnaise, Sriracha, lemon juice, garlic powder, and a pinch of salt. Chill until ready to serve.
07 - Serve the hot Cajun fries immediately with the spicy mayo on the side.