First I'd like to commend you for reading the Hebrew scriptures as well as the Greek ones. While Christians are not bound by the old law covenant (replaced with the new covenant formed with Jesus) it does not mean that we cannot gain many insights into Gods will from these scriptures.

"3 Thou shalt have no other gods before me. 4 Thou shalt not make unto thee a graven image, nor any likeness of any thing that is in heaven above, or that is in the earth beneath, or that is in the water under the earth. 5 Thou shalt not bow down thyself unto them, nor serve them, for I Jehovah thy God am a jealous God, visiting the iniquity of the fathers upon the children, upon the third and upon the fourth generation of them that hate me," -Ex 20:3-5 (ASV)

As you no doubt noted, these scriptures are discussing worship or veneration of objects. If anything is causing you to devote worship or veneration to anything other then God you should certainly abandon it. If however, it is just a picture of the last meal and it does not cause you to worship or venerate anything other then God then you would be in compliance with the direction of this passage.