Boil them, mash them, <stick> them in a stew

[AliBadass]

What does stick mean here?
(From a movie): What we need is a few good taters. Boil them, mash them, stick them in a stew.

 

[Barque]

It means "put".

If you have a word with multiple meanings and the context, and if you know which part of speech the word is (it's a verb here), the dictionary is a good resource. Just try looking for the meaning that fits the context. I assume you know what "taters" refers to.

stick - WordReference.com Dictionary of English
See number 7 under the first set of definitions of the verb "stick".