Here are a couple examples if you are asked to say a dinner prayer before eating:
For what we are about to receive, may the Lord make us truly thankful.
To this meal. In the words of Anthelme Brillat-Savarin, here's to "the creator: Forcing man to take in food for living invites him through appetite and rewards him with pleasure."
"Some hae meat, and canna eat,
And some wad eat that want it;
But we hae meat, and we can eat,
And sae the Lord be thankit."