I am unaware that the RCC has rescinded its understanding that Christ abolished the dietary laws.
Can you show me where that has occurred? Because your interpretation is incorrect. Paul is not speaking of the Jewish dietary laws here, but of the prayer that accompanies the idol-worship.
For if I by grace be a partaker, why am I evil spoken of for that for which I give thanks? Whether therefore ye eat, or drink, or whatsoever ye do, do all to the glory of God." -- 1 Corinthians 10:29-31"Conscience, I say, not thine own, but of the other: for why is my liberty judged of another man's conscience?
A man can eat anything as long as he gives thanks to the TRIUNE GOD of all creation. (I assume this admonition goes for thanking Mary and any assorted saints for the meal, too.)