DD only attends before and after school care (so afternoon tea/late snack), but she also attends vacation care, where she has the centre menu as well.
I'd say it's fairly healthy, but honestly, it's also really really boring.
Morning tea is veges, sandwiches and fruit. Lunch is sandwiches. Afternoon tea is sandwiches/scones/fruit/veges/occasionally a cupcake or fairy bread or something.