Palmer's Place that was in Gaylord Michigan - any remaining recipes?

When I was growing up my mom and I ate there for special events. We both loved the Mongolian beef very much and knew when our favorite cook wasn't in the kitchen because our meal tasted a little different - it was still good but it was different. Our favorite cook was called "Shorty." I'm looking for the recipe for the Mongolian beef dish. I've tried to reproduce the dish but the recipes I found are not even close to even compare. The dish had a black sauce that was sweet and a little spicy. The dishes I have attempted end up having brown sauce. Any help would be greatly appreciated. (I hope to make it for my mom's birthday.)