Begin by heating a saucepan or large pan over medium-low heat.
Chop the celery, onion, red and green bell peppers, and green onions.
Melt 1/2 cup of butter in the heated pan over medium heat.
Turn the heat up to medium and add the chopped veggies to the pan.
Add Cayenne Pepper, Cajun Seasoning, and Salt to the pan.
Cook for around 15 to 20 minutes.
Meanwhile, chop the two garlic cloves.
After sauteing for 15 to 20 minutes, add the chopped garlic and saute for another 10 minutes.
After another 10 minutes of sauteing, move the veggies to one side of the pan.
Mix in 1/4 cup of flour with the butter.
Stir everything together once the flour has been thoroughly combined.
Saute for 25 to 30 minutes more.
Be extremely cautious throughout this period.
If the fire looks excessively high, reduce it.
Around this time you can cook some rice.
Start heating 1 1/2 cups of water in the microwave with about 3 minutes left in the sauteing process.
Add a small amount of the hot water to the pan and stir until a creamy consistency is achieved.
Add the Louisiana Crawfish and the remaining hot water to the pot and mix well.
Turn up the heat until you notice a very little boil.
Cover and cook at a low simmer for 15 to 20 minutes.
If you want a thinner sauce, just add a touch of extra water.
Take it off the heat, and pair it with some plain white rice.