In Christianity is food recommended to be consumed using left hand? While reading &quot;Robertsoner Ruby&quot;, one of the Bengali detective stories from the Feluda Series, I found out that the investigator there finds out a character to be a Christian (which the character himself never disclosed till that point) when he observes that the character is consuming food using his left hand on three separate occasions. Now, this observation turns out to be correct too and eventually it also proves decisive in solving the case.
But I was surprised the way the detective has concluded and hence this question here.

Is it really true that in Christianity food is recommended to be consumed using the left hand?

Please cite some verses from scriptures in support of your answers, either to prove or disprove the claim.
There are no rules in Christianity about which hand you eat with. As NigelJ writes, Christianity does not consider how you eat to be important (see Matthew 15). Such rules as there were under Judaism were abolished in Christianity (and those Jewish rules did not prohibit eating with any hand).

So, given this, allow me to explain the story you read.

While there are no rules about which hand to eat with in Christianity, there is a prohibition on eating with the left hand in Islam, and I believe in Hinduism, which are the majority religions in India. So if the character had been Hindu or Muslim he would not have eaten with his left hand. Since he did, the detective deduced he is not Hindu or Muslim, in which case it's a fair bet that he is Christian, which is the third place religion. (Statistically speaking there are other alternatives, but that doesn't make for a good detective story).

So the deduction wasn't about rules in Christianity, but about Hindu and Islamic rules.