Niklas Ekstedt's recipe is authentic, Swedish, and tasty AF. If you can't find venison, beef will do.
EDIT: I imagine this is one of those things where there are 1,000's of different "proper" recipes. I shared this one as the guy who wrote it is Swedish, so I thought there must be some authenticity there, and I've made it, so can testify that it's good. Not saying it's the best or the most authentic, so slightly confused by the commenters saying it's somehow wrong?
Nice one buddy! IWNDWYT