Easy Cheesy Baked Keto Cauliflower

large head cauliflower, cut apart into bite-sized pieces

kosher salt (for water you use to boil the cauliflower)

butter

coarsely-grated Parmesan

grated sharp cheddar, yellow or white

grated three cheese blend (or any cheese blend that melts well)

coarse-ground black pepper (optional; we didn’t use it but I might add some next time)