Hi JM
RE your meal our, probably easy to do the Red day, steak, veg and Jacket. You could have grilled prawns or melon to start and a fresh fruit cocktail or share a desert thats not too bad with someone else and get them to eat more of it. Count that as your syns, try for a alcohol free night, diet coke or fizzy water with ice and lime wedges.
You will be fine. Perhaps in the morning, get yourself out for along walk. x