“That pasta is very less” isn’t something you would say in English. You could say “That is much less pasta,” though.
I’m not sure how you say it in Turkish. In the “-ki” lesson we learn to compare, so we could say (I think! Still learning myself!) “Benim makarnam seninkinden çok az,” which is more or less “I have much less pasta than you do,” but I don’t know if you can drop the specific point of comparison like you can in English to just get something like “That is much less pasta.”