Cast iron pizza pan (for dosa, not for pizza.)
Grill mats (Dan Pink loves his)
Omelet turner (Thanks to Paul McGowan for the gift)
Pizza cutter (Quality only costs a tiny bit more)
Silicon mat (Of course you need these)
And probably a sous vide machine.
A last tip: when searching for a recipe online, add the word “Kenji” to your search, because if Kenji Lopez Alt wrote the recipe, it’s a good one. Here’s his book.