What is the prime cut of roast beef a mark in odyssey?

It seems like you're asking about a detail from Homer's epic poem, *The Odyssey*. There's no mention of a specific "prime cut" of roast beef being served in the story.

Here's what we know about food in *The Odyssey*:

* Hospitality: The ancient Greeks valued hospitality, and food was a central part of it. Feasts were common, especially in the context of welcoming guests.

* Meat: While beef is mentioned, the most common meat in Homer's time was pork. Sheep and goats were also popular.

* Cooking: The most common cooking method was roasting over an open fire.

* Bread: Bread was a staple, usually made from barley or wheat.

So, while we know that Odysseus would have enjoyed meat as part of his meals, the specific cut of meat isn't detailed in the epic.

If you're interested in more information about food in *The Odyssey*, I recommend researching the customs and cuisine of ancient Greece.