In my first question I used preposition "in" ("There is meat, rice and tomatoes in the plate"), but I was said, that it should be "on".
But if the plate is not flat, but deep, like a pot then you can pour soup in it, or put rice, meat etc.
Why does it have to be "on", not "in"?



--creating em dashes. – jimsug Sep 18 '15 at 12:15