Given a paragraph about cooking, and a set of conversational question answers about the paragraph, generate a relevant question to the topic of the paragraph. The paragraph has the prefix 'CONTEXT:'. Each conversation question has a prefix `Q:` followed by the answer prefix `A:`.

[EX Q]: CONTEXT: Flour is a thickening agent, plain and simple. However adding it without cooking it first can lead to your dish having a raw flour taste, and you can get blobs of flour in it, so I would ignore the recipes which say coat with flour without cooking it first, or use cornstarch (cornflour) instead. Alternatively you can make a roux with flour in a separate pan and add it in later. This is simply mixing equal weights of flour and butter and cooking it in a frying pan until it has the color you want. A lighter roux will add a paler color and a milder flavor, a darker roux adds a deeper color and richer flavor.  <sep>  Q: Why should I roll the meat in flour for a ragout? A: I would ignore the recipes which say coat with flour without cooking it first  Q: What would you recommend? A: use cornstarch (cornflour) instead 
[EX A]: Why would you say cornstarch instead of flour?

[EX Q]: CONTEXT: The primary reason is definitely convenience. If you don't want skin and seeds in your sauce, then you have to do some work to avoid it. Yes, it's possible, e.g. passing through a food mill, or blanching and peeling plus retaining only the flesh, but having it already done is a whole lot easier.Passata is usually much thicker too, so it won't need as long a cooking time to reduce into a non-watery sauce as fresh tomatoes. On top of that, you don't have to worry about whether you can find good fresh tomatoes, e.g. if it's winter and they're out of season.Your two cases for comparison seem to overlook this: if you just chop and cook, you'll have skin and seeds in your sauce, as well as excess liquid to cook down, while if you use passata, you won't. (Also, for what it's worth, you'd need pretty giant tomatoes to get the equivalent of 3/4 cup of passata out of one tomato.)Of course, if you don't mind skin and seeds, it's also perfectly fine to simply cook fresh tomatoes and be done with it.Note that you can often get similar advantages from other canned tomato products. In the US, crushed tomatoes are far more common, and a roughly similar texture. (Peeled whole tomatoes, diced tomatoes, tomato sauce, and tomato paste can also be useful depending on what texture you're aiming for.)  <sep>  Q: What exactly is Passata? A: crushed tomatoes  Q: Is it better to use Passata instead of fresh tomatoes? A: The primary reason is definitely convenience 
[EX A]: Is the procedure that much more difficult to use fresh tomatoes instead of using Passata?

[EX Q]: CONTEXT: While I suspect that the formula is mostly reliable if you repeat the experiment with the same person, I found the individual heat sensitivity varies a lot. Most professional cooks and seasoned homemakers can handle (pun intended) higher heat than those who rarely expose their hands to high temperatures. In our home, weâve had heated discussions about whether the dishes in the just finished dishwasher are too hot to touch or not. And this is just one example.If you exclude the differences between individuals, using your own handâs heat sensitivity to gauge a temperature range is absolutely possible (as long as a few degrees donât matter). It takes time and practice - which is usually described as âexperienceâ. I personally donât think in âdegreesâ though, but more in categories like âtoo coldâ / âshould be okâ / âtoo hotâ and a few steps in between. So in short, if you need a precise temperature, get a thermometer. If you are still working on judging by hand, either get a thermometer or plan a few trial-and-error loops. And sometimes the exact temperature is not important for a recipe to work.Using the X-time at Y-distance formula may work, if your heat sensitivity is similar to the authorâs.  <sep>  Q: How accurate is the hand technique for grilling? A: While I suspect that the formula is mostly reliable if you repeat the experiment with the same person, I found the individual heat sensitivity varies a lo 
[EX A]:
How many inches should you hold your hand above the grill o know the temperature?