I've wondered if the jurors get paid lunch myself, but I get the sense that they eat in the courthouse. I'm not sure if paid or unpaid lunch will effect verdict.
Section I
How Jury Service Operates
No. 4 down tells how much jurors are paid ~ $18.50 for the first day, then $49.00 a day for any subsequent day of service. But I cannot find anything on their lunches. I was on jury duty years ago and lunch was not provided. However, it was a civil case and not a criminal case. I remember a few days when they brought lunches in for the jurors in the Hodi Arias case. I am thinking their lunches are paid for while they are deliberating? I don't know for sure.
http://www.utcourts.gov/specproj/selserve.htm