A wonderful sourdough, taco flavored bread! My son from Mississippi always wants to go to Amish country when he comes home to obtain the dry sour cream sauce mix. He has a start from my 36 year old starter and this is the only bread he will make! This recipe is from "The sourdough cookbook", by Rita Davenport. preparation time is a guess.. Note: you may substitute Liptons dry onion soup mix for the sour cream powder, and cheddar cheese can be used instead of parmesan.