Talk to Trott at the Outskirt Stable. He is a new stable hand but he's feeling pretty down. He will want a raw Gourmet Meat.
Gourmet Meat is found by hunting larger animals. The easiest place to find them is in the Hebra region. Look for the large moose and rhino-like herbivores, as well as the large wolves. They all have a chance of dropping gourmet meat. Just pick it up fast because the cold of the Hebra region will make it freeze.
Deliver the Gourmet Meat and Trott will give you a silver Rupee worth 100 Rupees as thanks.