During the Middle Ages, what religious group
influenced European life and dining habits?

The Roman Catholic Church or the Catholic Church.

Explanation:

The Medieval period was the period from the 5th Century to the 15th century. This period was heavily influenced by the Catholic Church or more specifically the Romantic Catholic Church.

The European society was greatly under the Church which is the authority over all things, religious and political. The Christian religion held great importance and influence over the lives of the people of Europe, whereby the lifestyle and even the dining manners/ habits were all affected. The art and architecture of this age were also greatly influenced, resulting in numerous art pieces and massive and important buildings, such as the cathedrals.  

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