

Unless you are willing to tell your boss to fuck off and go find another job, I don’t think it’s in your interest to tell him that. Someone with the mindset to tell you to study on your own time isn’t going to take it very well.
Either say fuck the certification and promotions and don’t study, or just study on work time surreptitiously, or suck it up and study on your own time to get the certifications to make yourself more valuable to get a job somewhere else where they don’t have that sort of mindset.
Boston baked beans. To my taste, good ones are cooked low and slow so that the beans almost start melting together, and they should be both sweet and tangy.