That's exactly what I had, though not at Thanksgiving. I found that white meat turkey has the largest percentage of protein of any meat. So I used a blender and heated up some Magic Milk and measured my turkey and mashed and gravy and smooshed it all together, then ate it with a spoon. After putting it in a bowl, I topped it with whole-berry cranberry sauce and it was delicious. I could have included sweet potatoes, but didn't have any in the house. I'd eaten with relatives a year or so before, and I just used a fork to smash what little portion I ate, while smearing the rest around my plate and announcing I was stuffed. No one knew how little I'd eaten because I vowed not to tell people. I knew they'd just dismiss my weight loss or say I was cheating. To this day, only my son and best friend know I had the surgery. I stick to that story because even with surgery, it's not exactly a cakewalk to recover and design your daily diet around health and restraint.
for the holidays, just use a fork. Get rid of that spoon and knife and smash your food a lot before you chew it slowly and swallow wee bits. It's really easy to appear like a person with restraint, who doesn't gorge herself over the holidays, and if, like me, you want to keep your life choices private, no one will ever know the difference. you can even have a sliver of pie and leave most of the crust on your plate. if you look around the table, you'll notice big piles of food on many plates, where they overserved themselves and couldn't eat it all.
Eat slowly, talk a lot, put your fork down between tiny bites, and halfway through, declare that you're stuffed like a turkey! At home, use a blender. It's actually really tasty.
