It depends which school I was at:
Boarding school in the early 1960s when we lived abroad was a revelation - fresh, crusty, white bread served at most meals; salads dressed with garlic, olive oil and vinegar ( at home you were lucky to get a tiny dollop of salad cream); lightly cooked vegetables (my Mother boiled every vegetable to death); and lots of exotic fruit and different cheeses with quince paste (membrillo).
School dinners in Belfast were dire! They served things in huge tin baths. The Irish stew was the worst - grisly, fatty lumps of mutton in watery gravy with tinned or frozen vegetables and lumpy mashed potato. A lot of semolina, tapioca and sago puddings ...
At my first school as a teacher in Coventry we had to do lunchtime duty and had 'family service', so all members of staff had to serve and eat with a group of about six children. The food was wonderful! The cook was allowed to buy her ingredients locally and cooked everything from scratch. I still remember her potato and cheese slice, meat and potato pie and best of all lemon meringue pie! It was a poor area, so she always made enough extra for seconds. The children had free school milk and the cook used to make biscuits to go with it - she used to stand at the kitchen door at playtime to hand them out.
When in 1993 I returned to teaching after I'd had my children things had changed and the school I worked in had awful school meals - everything made with the cheapest of ingredients and watered down - UGH! Then came the chilled meals cooked at a central kitchen and sent out in heated trolleys. I avoided them and always took a packed lunch
!