"broken rice grains" is correct and can be used in written English.
For example: After the storm, many of the paddy fields contained broken rice grains.
I lived on sorghum and broken rice.
Turn the heat up to high and boil the porridge until the rice grains break down almost completely and the liquid is the consistency of heavy cream, another 10 minutes.
An important strategy to break through the rice grain yield ceiling is to increase the biological yield.
They write, "Some people like their congee thin, with the rice grains cooked until broken and somewhat shapeless.
Note : Be careful; if you stir more, then the rice grains will become broken.
2 The dish is ready when lentils have broken down almost to a puree and the rice grains have swelled and almost burst – in fact, it looks rather like a khaki brown porridge.
The rice grains will swell and begin to break up.
Rice grains display a comparatively geometric shape, which can be broken down into grain length (GL), grain width (GW) and grain thickness (GT).
The rice grains will have softened and expanded.
From Sri Lanka, woven rice stalks adorn a wall, the heads thick with rice grains.
