Cook pasta according to package directions. Rinse, drain and pour into large bowl.
Stir the flour into the pasta.
In a small bowl, whisk together the egg, cream and water. Pour over the pasta and stir.
In another small bowl, mix together the bread crumbs and cajun seasoning. Stir into the pasta.
Fill a pot about 3" deep with the oil and heat to 350 degrees.
When hot, add the pasta, a spoonful at a time to the oil and cook, in batches 5-7 minutes or until golden brown and slightly crispy. Remove pasta with a slotted spoon and place on a plate lined with a paper towel to drain.
Serve with marinara sauce.