“Too many” kinda sounds right to my ear because beans is plural, but the second logically seems right because its served by volume and is not ‘countable’ as ordinary (non-destroyed) beans might be.
“Too many” kinda sounds right to my ear because beans is plural, but the second logically seems right because its served by volume and is not ‘countable’ as ordinary (non-destroyed) beans might be.
A technically correct alternative would be to drop that plural “s” but forego any uncountable noun that describes the form the beans take: “I had too much refried bean today.”
In the wrong context it might evoke the idea of one enormous bean that the speaker was unable to finish, but like I say, technically correct.