I am sometimes asked to offer a blessing on food. The request is well meant, but ill educated. It is redundant. The food, the people gathered, the earth, sun, and rain that made the food are the blessings. Grace serves the purpose of recognizing the blessings of the people and the food. The highest way to recognize the blessing of the people and the food is to express gratitude and appreciation for them. Saying grace is a giving of thanks.
Thanksgiving is not a yearly event. It is a daily and hourly event. Any moment you recognize the blessings in your life you also recognize the grace bestowed upon you. It takes a clear and humble heart and mind to recognize our lives are moment to moment full of grace, but the moment you do you are filled with peace and joy.