We had a building - much newer than the school - for school dinners, about 100 yards from the main buildings.
The prevailing wind meant that we quite often could smell the dinner well before we went over there.
Every few weeks, the repulsive smell of macaroni cheese (well, the way they did it) wafted up on the breeze as we came out of the last morning lesson. And almost everyone hated the stuff, like extra lumpy wallpaper paste, with some sort of chemical cheesy pong added?
We got fed in 2 shifts, each day there was some sort of alternative offering, but only enough for about 2 tables (of 5 or 6) in the hall. And that was just the first sitting, if you were 2nd sitting that week, the only choice was to leave it, and hope to get 2 puddings?!
They did another 'special', nobody ever knew what it really was? It was some bright red meaty stuff (?), served with a bit of pastry - like a little pie lid? I heard a rumour it was 'corned beef pie', but the texture wasn't right - maybe it was mostly tomato puree? -- and I've never heard of a corned beef pie since. That was another day they had a lot left over.
I complained to my parents, but my dad had been in the Army, and some horrible places & conditions in WW2, so he had little sympathy, they'd been glad of anything!