Beef Stroganoff in San Diego
Pomegranate on El Cajon Blvd in North Park has Stroganoff - both Beef and Vegetarian on the menu.
I haven't had the stroganoff, but others I have been with ordered it and enjoyed it very much. There were a couple of threads about the place a year or two ago and it generally got very positive comments.
I went to pomegranate for my birthday this year and my mother ordered the stroganoff and I was pretty stunned how good it was! I havent had many stroganoffs but this one took the cake. But I think in experience - as a whole - this restaurant only puts out REALLY good food.
You might want to check out Rei do Gado or Brasil for Brazilian stroganoff which is very popular there too.