I was hungry but I did not eat meal (active to passive voice):

However hungry I was I have not eaten meal

Meal had not been taken by me but I was hungry

Meal was not eaten by me although I was hungry

Meal is being not eaten by me although I was hungry

The correct passive voice sentence is: Meal was not eaten by me although I was hungry.

It accurately reflects the original sentence in passive form.

It maintaining both the meaning and grammatical structure.