A popular Christian blessing is "Bless, O Lord, this food to our use and us to thy service, and keep us ever mindful of the needs of others. In Jesus' Name, Amen." Pre-meal blessings are known as grace.
The term "grace" is mostly associated with Christianity; however, many religions say grace. For example, an Islamic blessing is "O Allah! Bless the food You have provided us and save us from the punishment of the hellfire."
Other pre-meal blessings include the Hindu prayer "The act of offering is God, the oblation is God, By God it is offered into the fire of God, God is That which is to be attained by him who sees God in all."