Those with money had plates made of pewter. Food with high acid content caused some of the lead to leach out onto the food, causing lead poisoning and death. This happened most often with tomatoes so for the next 400 years or so tomatoes were considered poisonous. (I always wondered why this was)
Most people did not have pewter plates but had trenchers, a piece of wood with the middle scooped out like a bowl. Trenchers were never washed and a lot of the time worms got into the wood. After eating off wormy trenchers one would get "trench mouth".
Bread was divided according to status. Workers got the burnt bottom of the loaf, the family got the middle, and guests got the top, or the "upper crust".
We'll end this series tomorrow