Yesterday, @Kerry Beal shared a menu offering a Cherry Negroni using Dillon's Cherry Gin, which sounds interesting but isn't something I've seen around here But it got me to thinking about a Sloe Gin Negroni. I found 2 previous mentions here on eG. This one suggested using a standard recipe with "half a measure of sloe gin" while this one omitted regular gin and went with equal parts sloe gin, campari and sweet vermouth plus some orange bitters.
I picked a recipe from the Sipsmith website: equal parts London dry gin (I used Tanquery), sloe gin (Plymouth), Campari and sweet vermouth (Cocchi) with an orange wedge.
I quite liked it.