Where did the idea come from to use bread as a plate?

The idea of using bread as a plate, known as "trencher," dates back to medieval Europe when food was often served on thick slices of bread. This practice was practical, as the bread absorbed juices and flavors from the food, making it both a serving vessel and a part of the meal. Moreover, after the meal, the trencher could be eaten or given to the poor, minimizing waste. The concept reflects the resourcefulness of past culinary traditions, where every element of a meal was utilized.