as a vegan, I hate stuff like this. I'm vegan for my health. I see nothing but insanity in recreating high-fat foods from different materials, so that I can keep the obesity but get rid of the good taste.
I lost 2 kg since starting baking pies myself. And I am using pate sablee, lots of heavy cream for the custards, dozens of yolks and so on. You just need to eat smaller sizes of the finished product. My roommate put on couple of pounds though.