How should I celebrate my 39th birthday?

[Mr Looks]

Thanh Long’s exact recipe remains shrouded in secrecy, even as restaurants all over the Bay Area have created very similar versions of the dish. Famously, the Ans don’t allow anyone outside of the family to cook the noodles (or other signature items like roast crab), instead prepping them in a secret kitchen tucked inside the main kitchen. And the garlic noodles are a glaring omission from the aforementioned An family cookbook.

https://www.kqed.org/arts/13900855/garlic-noodles-sf-bay-area-iconic-foods-thanh-long-smellys

How is secret recipes allowed there

Dont you have food inspectors?