IR and ER preterirte The verb only

¿Quien?/ escribir

Example:
Yo/comer= comì

Ineed translate this to spanish ! you (informal) are patient but funny.

Mary just sent out invitations to her wedding last week the invitations were so heavy that she put more than just one stamp on each envelope she used 255 stamps and mailed out 85 invitations and see you as an equal amount of stamps on each envelope

Which verb phrase means “to cook the food” in spanish