those recipes that use things like bisquick all mixed with the other ingredients and then separate during cooking have always amazed me. I know its about the cooking and the chemical reaction of the ingredients that separates them but its still amazing. The pie sounds good, i will have to pick up some bisquick and make it one day.
Tell your brother that next time he may try the bisquick website, im sure they have one, and i bet the recipe is there, along with others.