What the !@# is Quark??

Quark is a fresh creamery cheese commonly used in Germany, Finland and other parts of Europe, somewhat similar to cream cheese. It is made by letting certain bacteria ferment milk, with the resulting curd. Some of the whey is removed to standardise quark into wished thickness. It is an acid-set cheese like "fresh" or "farmer's" cheeses, not a rennet set cheese.

Now you know. Blech...