A few years ago, I used to go twice a year on exercise at St Mawgan.
Worst food - any meal in the Mess there.
Best food - the food in the mobile kitchen in the HAS site just up the road that had been set up for the troops.
We used to try any opportunity or excuse to eat in the HAS but were firmly told 'you're living in the Mess, you're eating in the Mess!'.