Okay, I'm really behind on this, but Abby (the one in the "contributor" sidebar over there) posted these two things on her personal blog about beef stroganoff. You should read them. First, because she's hilarious and a fantastically snarky writer. Second, it's a good recipe for beef stroganoff. Sadly, I was raised on the "fake" beef stroganoff and am not fond of it. (No finger-pointing at my mom, though. With 8 kids, there was never steak in our house. I think the first time I actually ate steak, I was an adult.) I'm delighted to discover the correct way to make beef stroganoff because I had no idea there was another way to do it.
By the way, Abby, thank you for posting this blog in your comments, but at the same time, I'm offended that you didn't think yourself to cross-post those posts here. This is, after all, where we promote good eatin' and eliminating the junk from our kitchens. Including junk recipes, apparently.
the initial rant about fake vs. real beef stroganoff
a second post about how Abby makes the real beef stroganoff - make sure to read the comments as well.