I have adapted my fiancé's recipe which is a basic recipe utilizing chuck, button mushrooms, and onions.
Keeping the Stroganoff 'authentic' but giving it more depth, I have found that changing only the types of mushrooms used gives significant variety. I look towards meatier type mushrooms that I can cut to bite size and meld it into the dish.
I happen to have a 'forest blend' mushroom available to me at the local grocer and I'm hoping to get Winecaps to flush in my garden to experiment with. I'm also hoping to incorporate walking onions into the recipe because I tend to have a glut of them.