My easiest Christmas dinner was a few years go. On the day, DH, DS, DIL and GC not well with flu, decided no one could face the big dinner. Luckily the turkey was a fresh one, so froze it. The family stayed at their home, DH in bed all day, only wanted Lucozade to drink. 
I had some of the bacon intended for the turkey with a fried egg for dinner. Quick, easy, tasty, simple. Spent all day watching relaxing rubbish on the tv, South Pacific, Wallace and Gromit, 7 Brides for 7 Brothers, all stuff DH wouldn’t want to watch, but hey ho, he was in bed!
A different Christmas Day, but selfishly, it was quite a restful one for me!