Turkey dinner on Thanksgiving may be a prime example of this, although there are probably a few people that cook a turkey 2 or more times a year, I don’t know any.
For me, the classic example of this is chili. I love chili, but since I live in Florida it’s not a meal that fits often with the weather. And when I do make this it’s a huge batch that lasts for several meals until the fumes are too much, if you know what I mean.
So what’s your once a year concoction?