The proper response isn’t to quit, It to send a response that says that the law requires a break, and you intend to follow the law, even if my supervisor demands that I break the law. I will not follow an illegal directive.

I’m the future, I will take all legal breaks, for their full amount of time.

Further, I will be saving this email as evidence, in case of any future lawsuits by any employees. Any future discussion of this subject will be shared with the state department of labor.

And I would copy HR.