This resource contains a reflection on expressing gratitude after meals and a succinct version of the grace after meals recorded in the Babylonian Talmud (Brachot 40b).
It’s actually pretty radical that in Judaism, the ritual of grace after meals isn’t about expressing gratitude for food itself but for food and a full feeling.
To say grace, therefore, requires a sense of intention around the act of consumption, nourishment, and feeling good as a result.