Preheat oven to 475°F.
Wash potatoes. Slice into strips.
Place in a large bowl and cover with hot water. Let stand for 20 minutes.
In a small bowl, combine all Popeyes Cajun Spice Blend ingredients. Mix well. Set aside.
Drain potatoes and dry them off thoroughly.
Brush a baking pan with 3 tablespoons of oil.
Sprinkle pan with 1/3 of the Popeyes Cajun Spice Blend.
Place dried potatoes in a dry bowl. Add 1 tablespoon of oil. Toss to coat well.
Sprinkle lightly with Popeyes Cajun Spice Blend, tossing around a bit to make sure all sides are coated.
Place spiced potatoes on the pan in a single layer.
Cover with foil.
Place in preheated oven. Bake 5 minutes.
Remove foil. Continue baking for another 15 - 20 minutes, until golden brown on the bottom. (How fast they cook will depend largely on how thick or thin you cut your strips. Watch closely so they do not burn.)
Flip potatoes. Continue baking until crisp and golden, about 10 - 15 minutes. Again, watch closely so they do not burn.
Remove from oven. Sprinkle with the rest of the Cajun seasoning. Drain on paper towels.
Serve hot with a good dipping sauce. Or two.