Food / Questions on Polish food: Oscypek and Zurek. Also zeberka. [18]

1 - Oscypek. You see old dears selling these all over Krakow - is it safe to buy them from them from a hygiene point of view? I mean, they are cheese after all and are sat outside for probably days on end.

2 - Zurek. I've tried a few packet type Zurek in the UK and none are as good as proper home made. I've seen a bottled version at my local shop (also at thetasteofpoland.co.uk/index.asp?function=DISPLAYPRODUCT&productid=274 but how is it this used? Is the bottle just shaken and heated or must water be added. Also (this may cause arguments), what are the correct ingredients to add to Zurek? I've seen mushrooms, potatoes, egg, kielbasa ...

Thanks!

Lee.