All you need is :
1 cup of flour
1 tbsp Onion Salt
1 tbsp Garlic Powder
1 tbsp Paprika
salt and pepper to taste
Wash your potatoes and skin them. Once they're skinned slice them into french fry shapes. You can slice them long ways and then turn flat and chop thin sticks. If you are planning on making these later put your potato sticks into a bowl with cold water and salt so they dont bruise. Place in the refrigerator.
If your potatoes were soaking in the salt water go ahead drain and dry them.
Heat your oil on med. high temp.
Dust your fries in flour so your batter will stick.
Mix your flour and seasonings (excluding Cajun Seasoning) into a bowl and pour 1 cup of water to make a batter.
Dip your potatoes in the mixture.
When coated place in the frying pan with the heated oil and fry them for about 10 minutes, until you get a nice golden fry.
When done place them on a plate with a napkin to drain the oil and sprinkle salt over them, this is where you sprinkle your Cajun Seasoning to your liking. You sprinkle your Cajun seasoning on after the frying because the oil is still wet and holds it better to your potato.