Texas Roadhouse Portabella Mushroom sauce

Last week we went to dinner at TexasRoadhouse and I had the Portabella Mushroom Chicken. The Chicken was covered with this awesome portabella mushroom sauce that was to die for. My BF loved it and I want to try and duplicate it at home…Anyone happen to have the recipie??

I know the chicken was topped with the mushrooms, some sort of suace that had parm. cheese, garlic and I really dont know what else.