SRD:Goodberry

Casting goodberry upon a handful of freshly picked berries makes 2d4 of them magical. You (as well as any other druid of 3rd or higher level) can immediately discern which berries are affected. Each transmuted berry provides nourishment as if it were a normal meal for a Medium creature. The berry also cures 1 point of damage when eaten, subject to a maximum of 8 points of such curing in any 24-hour period.