OMG this thread. WHY did I read this on a fast day???
I'd probably go for McD's if I was on my own. Double quarter-pounder with cheese, chocolate milkshake, large fries.
Love Dominoes as well though (hence need for fast days). Would be stuffed-crust pepperoni with mushrooms and olives, plus chicken strippers, bbq sauce and cookies.
Mussels and crusty bread? Bloody hell. I love mussels but that answer on a dirty food thread is the reason MN has such a bad name, imo.