Every Sunday, in fact, every day at Mass, the priest prays an offertory prayer.  As he lifts the bread, the small host that will become the body of Christ, the priest says:

“Blessed are you, Lord God of all creation,
for through your goodness we have received
the bread we offer you:
fruit of the earth and work of human hands,
it will become for us the bread of life.”

The simple bread that the priest holds is itself, even before its supernatural transformation into the true body and blood of Christ, the natural gift of God as the “fruit of the earth.”

~Source: USCCB