Place the water in a large sauce pan over high heat.
When the water boils add the pasta. Cook until the pasta is al dente (about 15 minutes). Drain the pasta when done.
While the pasta is cooking, place the olive oil in a large skillet over medium high heat.
Add the onions and cook for about 5 minutes, stirring frequently.
Peel the casing from the sausage and discard.
Dice the sausage.
When the onions are translucent, add the diced sausage and cook for about 5 minutes. Stir frequently.
Add the tomatoes, water, Creole seasoning, thyme and pepper.
Cook for about 20 minutes over medium low heat, stirring occasionally, until there is almost no liquid left, then add the shrimp.
Cook for another 5 minutes until the shrimp is cooked through.
Remove the shrimp and sauce to a large bowl and add the cooked pasta to the shrimp mixture.
Mix well and chill in the refrigerator.
When the salad is cold, add the bell pepper, celery and mayonnaise and fold together.
Chill until ready to serve.
