The fat Undead zombies that explode if they take fire damage. Either wander around at night, or make a few runs through the Catacombs.
Note that Ambrosial Meat CAN decay and become rancid/stale, so take five Airtight containers with you to keep them at the condition the quest requires. --- "The universe has a wonderful sense of humor. The key is to learn how to take a joke." www.youtube.com/user/Terrafuror - Gimme a view ;)
Ambrosial Meat is a 1% drop from most animals that drop meat. There are other ways to acquire it as well. --- ~ PSN ID: ValorPhoenix ~ Raven [ / . \ ] Hubris ~ Bone Ravens "There are more defective users than defective systems."
Bust the crates in the ogre's den area of the Ancient Quarry. Soul Ambrosial Meat is common from those.
FYI, only quest I know of requires 5 Kept Sour Ambrosial Meats.
You can 'age' regular meats to make them sour and more valuable. Just don't let them go rotten. --- ~ PSN ID: ValorPhoenix ~ Raven [ / . \ ] Hubris ~ Bone Ravens "There are more defective users than defective systems."