Quark (called Kvarg here) has become Swedens national fitness food. Only people who work out eat it, so if you see someone buying it, you know they lift or are cutting.
You can mix it with pretty much anything. I've even made some decent tasting mayonaise with it with like 3x as nuch protein as fat, lol. You should try it with cocoa, splenda and banana.
Also, no need for casein powder since quark is cheaper here and more filling.