This quest is not available in game.
Seek out the Carrion Grubs and Devourers of the region. Slay them and harvest their meat. Return to Tirion Fordring when you have gathered 15 Slabs of Carrion Worm Meat.
My food supplies are running low, <race>. I am ashamed to admit that I might not have enough food to share with you.
Could you assist an old man with a simple task? Around here, the only manner of beast unaffected by the ravages of the Plague are the Carrion worms. While rather bland in taste, the meat of the worms can easily be preserved to last for months. I will need several hundred pounds to restock for the coming winter!