About 3 slices (adjust the amount to fit the size of your food mill)
Put the rice bread slices into the fridge to chill. Be sure to properly chill them! (This is key).
Tear up the dough while it's still cold into small pieces. Put it in your food mill and pulverize it (I recommend cutting them thinly).
After turning them into crumbs, they should look like this. Now they are done (Grind until you reach your desired fineness).
It's convenient if you make a large amount and store it in your freezer.
Story Behind this Recipe
I've tried making this a bunch of different ways, but this one was the best since there is no way to mess it up!
When you put rice flour bread in the fridge, it hardens. When that happens, use a mixer or a food mill. Try not to use soft bread because it will just become sticky. Trust me, I found out the hard way. Take a look at the recipe that I uploaded for rice bread. I included pictures as well.