re: I have a pd. of peeled crawfish tails

The tails are already seasoned. That's half your battle right there in making a sauce.

I'll try to make this as quick and easy as possible without risking you wasting beautiful, delicious crawfish with crap jar sauce or something not homemade.

Do this in a large pan:

-Medium heat
-Squirt of olive oil
-Sautee half a large white onion, a bell pepper and two chopped celery stalks (sliced mushrooms if you like)
-Add chopped garlic when onion is translucent
-Lightly salt and pepper what's in the pan
-2 bay leaves
-Two cartons of heavy whipping cream
-Add crawfish tails and stir very well so seasoning mixes with cream
-Let simmer slowly for about 10 minutes
-Lightly salt and pepper again, add any herbs you like
-Fresh squeezed lemon juice, stir well
-Chopped fresh Italian parseley

-Toss al dente cooked fettuccine into pan, let simmer on low for another 5 minutes.

Serve.


...ETA: a nice little trick is to get a few tablespoons of the starch water that pasta cooked in and dump it into your sauce right before you drain and add the pasta. It helps everything stick to the noodles.