I happened upon “A Book of Pagan Prayer” by Ceisiwr Smith and used some guidelines there to construct this prayer of thanks to Cernunnos.
Cernunnos, horned one, great antlered god.
God that defies precise description,
both animal and man, dweller in the forest.
God of life, fertility, and underworld as well,
I honor you, I praise you! (Repeat line until you feel it!)
I give you this offering of thanks (Give bread)