Germany:
In the school cafeteria there was a choice between two meals, usually some meat with greens on the side, a slice of pizza, or burgers. Nothing special, but also not too bad. And always a bowl with yogurt that had fruits in it as desert, which was usually the highlight.
In higher grades, I started going to the bakery on the other side of the street for a sandwich (but not a flat sandwich, I mean a bun with cold cuts and salad, aka. "belegtes Brötchen").