salt curing yolks is super easy and great for quick meals when you find cheap eggs. just mix equal parts salt and sugar in a shallow dish, make little wells for the yolks, cover them completely, and put it in the fridge for about 5 days. after they firm up, rinse them gently, bake at a low temp like 150f for an hour to dry them out, and then you can grate them over pasta, rice, or avocado toast just like parmesan cheese.