Gently heat two large pots. Fill one with water, and boil.
Once boiling, add salt and pasta. Boil for 10 minutes, drain. Set aside.
In a bowl, season peeled shrimp with Liquid Shrimp & Crab oil.
Add Cajun/Creole seasoning and garlic salt. Mix and chill.
Chop onion, celery, bell pepper, and garlic separately.
Melt butter in a large pot, add onion, celery, and bell pepper. Cook for 20 mins.
Include garlic, and add Rotel tomatoes. Cook for 5 more mins.
Mix chicken broth, cream of chicken soup, Half & Half.
Heat sauté pan, melt butter. Cook shrimp 3-4 minutes.
Stir pasta in a pot, cook shrimp in a pan.
Combine sautéed shrimp into pot, stir.
Pour equally into oven-safe pans.
Bake at 350°F for 15-20 mins.
After baking, remove foil, cool for 5 mins.
Serve shrimp fettuccine with garlic bread or salad.