Here is a goal: dry spent grain

How would you accomplish this goal?

OPT:
[A]. Turn your oven on to the lowest heat setting available. spread the grain on a cookie sheet, periodically check how damp it is. When the grain is dry, it will be lighter weight, and crumble in your fingers., then remove from the oven.
[B]. Turn your oven on to the lowest heat setting available. stack the grain on a cookie sheet, periodically check how damp it is. When the grain is dry, it will be lighter weight, and crumble in your fingers., then remove from the oven.
[A].