Hey guys, I noticed no solution here for this relatively easy to get but slightly time intensive achievement to get.
I am relatively certain you can get this using a bunch of different methods, and will likely get it over normal play through, but the one I will be using is by cooking meat acquired through trading and killing things.
If you need a cooking location one that I used primarily is Starlight Drive In
and direction left of it is Drumlin Diner
(thank you Grimace 221) -the woman there is a trader as well as having the occasional trashcan Carla who is a traveling merchant (don't forget you can use wait command by sitting in a chair/stool)
With the use of both of these locations and fast traveling it is possible (depending on your caps, (no you don't need to save) Using and buy any 'uncooked' meat she has and roast it on the cooking location already available at Starlight
. For example radroach or brahmin meat.
Please note you will run into 2 non critical not all too difficult named raiders at the diner, and some mole rats at the drive in if it's your first time there. But once cleared you shouldn't run into anything other than the occasional couple of raiders at the drive in.
You can get some fair exp and very good food/recovery items (better and faster than stimpacks in some cases) by using this method. But it isn't necessary to save.
*~ extra but not necessary
The magazine found aboard the U.S.S riptide (directly south of the C.I.T. ruins and north of diamond city you can find a magazine which allows you to collect more meat from animal kills. *re edit others have reportedly gotten the issue with this perk in various locations. http://fallout.wikia.com/wiki/Starlight_Drive_In
Please comment, I will edit if need be. Just hope this helps!