Simo and Cicci recommend

It is definitely advisable to consume pasta with salted cod on the same day, but you can store it well sealed in an airtight container in the fridge for one to two days at most.

You can also add other ingredients to the seasoning such as black olives, pine nuts, chili pepper, basil, etc.

You can use other pasta shapes such as paccheri, scialatielli, rigatoni, and also long pasta like spaghetti, linguine, etc. Furthermore, you can also use whole wheat, gluten-free, or legume-based pasta such as peas, chickpeas, or lentils.