I don't cut them off, technically, but do expect them to eat more than bread/fruit.
I give them a full serving of each component (veggies, meat, fruit, wg bread, milk) then allow seconds of all or any one as required by regulations. For thirds or even fourths they must be eating all components of the meal each time.
Ex. To get a
third wheat roll they must clean their entire plate. I am required to give the second wheat roll once they have finished the first and had the 15 minutes to have cleared their plate.
Breads (rice, noodles, etc) and fruits seem to be the only things kids like to fill up on and then refuse to eat the veggies or meats. I serve veggies and meats first for this very reason. Breads last.
