All these threads and discussions of food, and suddenly from the depths of my mind comes this query 
It was an unmistakeable smell when at school, and then decades later when I worked in dozens of different schools, every single school had the school dinner smell.....why ? what was it ? why was the smell so prevalent ?
From inner city to western isles, from country to town to....they all have that same smell at lunchtime.
Why ?

It was an unmistakeable smell when at school, and then decades later when I worked in dozens of different schools, every single school had the school dinner smell.....why ? what was it ? why was the smell so prevalent ?
From inner city to western isles, from country to town to....they all have that same smell at lunchtime.
Why ?