Go to the Nuka Cola factory and on the left there is a small town. Go to the shed, lockpick(100) and rob the meat in the fridge (30 in total).

Leave and a man askes see anything in there, say what you want but kill them - they are cannibals!

Get the key to the basement and take more meat (30 in total).

Then go to little lamplight and trade with Clair for fungus.

Then sell the fungus for about 40 bottlecaps.