Bring 4 quarts of water and 1 tbsp coarse sea salt to a boil
Add the cavatapi noodles and boil 8-10 minutes or according to package directions
Using a colander, drain the noodles and set aside
To a very large pot add the heavy cream, evaporated milk, ground mustard, cayenne pepper, and salt
Over medium high heat, bring the cream mixture to a boil, reduce the heat to medium, and simmer 15 minutes to reduce the amount of liquid by 1/3rd and enhance it's thickening power
While the cream mixture is simmering, cut the cream cheese into small cubes and grate the cheddar cheese
After the cream mixture has simmered 15 minutes, add the cheese and stir until it is melted and the sauce is thoroughly combined
Stir in the cavatapi noodles