I'm surprised you are not suggesting a St. Stephen's Sour. It is slightly unusual, but I limit myself to two on St. Stephen's Day!!
It's really just an odd Gin and It.
I have found store bought cocktail onions to be pretty disgusting. Does anyone have any tips for homemade or maybe an artisan brand?
Try Sable and Rosenfeld onions, they're pickled with Dry Vermouth and are the best I've found.