a little more beef vs. a few more beef

[J.Ho]

English Language Tests, Intermediate level

ESL/EFL Test #249 "Few, a little and some (1)", question 1

This meal was so good. Do you think I could have a ......... more beef, please?

(a) few
(b) little
(c) some

English Language Tests, Intermediate level

ESL/EFL Test #249 "Few, a little and some (1)", answer 1

This meal was so good. Do you think I could have a little more beef, please?

Correct answer: (b) little

Your answer was: incorrect
This meal was so good. Do you think I could have a few more beef, please?
_________________________

why we can not say few in this sentence, can you explain please?

J.Ho

[Conchita]

A few is used with countable nouns only: e.g. a few minutes, a few people, a few more lamb chops.

'Beef' is an uncountable noun.