Given the background description of some cooking related query, summarize the question into a title

[Q]: It seems to be a popular ingredient in Asian (esp. Chinese?) food. I encountered them on pork spareribs, and some side dishes. Apparently it turns everything completely black when it is added.I can rule out soy sauce (which is too salty and tastes entirely different) and I realise that this question is rather vague. What additional information could I provide?Edit: I can rule out oyster sauce. I asked in a restaurant what the black stuff was, but either she didn't understand me or she didn't want to (all she told me was that it contained salt). Finally she said she made it herself. Anyway, I bought Hoisin sauce:and I think it's as close as it gets (perhaps the restaurant uses a slightly different version of the one I bought, as mine is a bit saltier and a bit less sweet).Update: I finally discovered the exact sauce I was looking for. It turned out to be Black Bean Garlic Sauce.
[A]: What is the black, slightly sweet, flavour in some Asian food?


[Q]: My girlfriend and I make a large batch of yogurt every week, and have done so for more than a year now - we just eat a ton of the stuff. THis leaves a lot of leftover whey which we used to just throw out. This past week I took my first swing at making mozzarella, and noticed that the recipe suggested not throwing out the whey, but rather using it to make ricotta by boiling it. I ended up throwing out the whey from the mozzarella anyways because it was a tiny batch, and we had to make yogurt anyway.So, we made the yogurt, and my girlfriend saved they whey for me. I've been simmering it for a few minutes now, and it doesn't appear to be working. Nothing is curdling. I'm wondering if its a function of not having anything acidic in it? I tried adding a quarter teaspoon of citric acid, but still nothing is curdling. At this point I'm curious to play with it, so I may try simmering it all the way down into gjetost. So really i guess my question is, outside of being less acidic, is whey from making yogurt different from whey from cheese making?Also as a note, we use 1% milk.
[A]: Using whey from yogurt to make ricotta


[Q]: I was in the middle east for a few weeks a few months ago. Anyways, I was introduced to the following Nestle cream: It didn't really taste like the cream I'm used to here in North America.Have any of you tried this before? Can I make it at home?
[A]:
Nestle Cream "Ashta"