To the best that I can remember while living in Indonesia, I never came across beef satay with peanut sauce. I saw this on Discovery Channel, on a program called "Food Safari" to be precise. They were airing an episode that features Indonesian food and beef satay was one of them. Of course, I was drooling....... Before too long, I had my own beef satays with peanut sauce.
I made mine using my own way, in which the beef was very simply seasoned. The peanut sauce that I used was similar to the one that I use for other Indonesian dishes like gado-gado. The recipe from Food Safari can be seen here.