What do the serfs usually eat for dinner?

The premise of your question is based on a historical context that no longer exists. Serfs were peasants in medieval Europe who were tied to the land they worked on and were required to provide labor and services to the lord of the manor. Their diets were typically simple and based on the availability of locally grown crops and livestock. While their specific meals varied depending on the region, common staples in their diets may have included bread, porridge, vegetables, cheese, and occasionally meat.