Chop the carrots finely.
You can just bring vegetables - tomato[es], carrots, cucumber and potatoes. (Skills for Life (Entry 2); A2; Polish)
The carrot is the extra payment they will get if they finish the work on time.
Weiss['s] policy of dangling the carrot proved useful - he managed, literally, to hit two birds with one stone. (Certificate of Proficiency in English; C2; Polish)