Welcome to Substack! I’m new, too, but am loving it so far. My mother was from Germany and my husband, as well, so I understand the Quark situation lol. I wanted to share a cookbook I found from a lovely young woman I follow on Instagram, Audrey Leonard. She goes through the Quark making process in it, and the name of the book is Süss. I was drawn to it because it is the same name as my cookie business and ended up being full of lovely authentic German recipes. Happy baking! Tschüss!