Goodberry

When a druid casts a goodberry spell upon a handful of freshly picked berries, from 2 to 8 of them will become magical. 

The druid casting the spell (as well as any other duid of 3rd or higher level) will be able to immediately discern which berries were affected. A detect magic spell will discover this also. 

Berries with the dweomer will either enable a hungry creature of approximately man-size to eat one and be as well-nourished as if a full normal meal were eaten, or else the berry will cure 1 point of physical damage due to wounds or other similar causes, subject to a maximum of 8 points of such curing in any 24-hour period. 

The reverse of the spell, badberry, causes rotten berries to appear wholesome but each actually delivers 1 point of poison damage (no saving throw) if ingested. 

The material component of the spell is mistletoe passed over the freshly picked, edible berries to be enspelled (blueberries, blackberries, raspberries, currants, gooseberries, etc.).