Flavor – How to avoid onion sweetening when sautéing

I would do it the other way round, I'd fry the sausages first, then add the veg. This has a few benefits as I see it:-

• The sausages will brown more evenly, purely aesthetic but some people will think they are not cooked if they are not brown.
• You'll get the oil out of the sausages so you'll have a better idea of how much oil to add when you add the veg, if any.
• The veg will sweat down in the sausage oil which is likely to be much nicer than the other oil
• You can cook the sausages on a really low heat to start with so that they really get sticky and caramelised, then when you add the veg back in you can add a spoon of water/vinegar/stock to deglaze the pan an get that lovely sticky sausage goodness all over your veggies, which will be delicious.

You could optionally take the cooked sausages out of the pan and do the veg separately, or keep 'em in there, I'd probably take them out so I could turn the heat up a bit without having to worry about the sausages.

I'd say that when you do add the veg you want a thin (1mm ish) layer of oil in the pan. Depending on the pan this is probably a tables spoon or 2. You probably don't need to scale up as if you are cooking a bigger batch you will probably use a bigger pan, and so a similar depth of oil should suffice. If you are using the same pan, but with a deeper amount of veg, then I would add a little more, but I would make the depth of oil in the pan proportional to the depth of veggies.

Remember the golden rule. You can always add, you can never take away. And once the veg start to cook down and the volume decreases then the oil ratio will be higher, so start out with a little less than you think, just enough to coat the veg when tossed in it.

I've never really considered there to be a real difference between sautéing and frying. They both mean to cook in a hot pan with a little bit of fat. However there isn't a lot of consistency online. It doesn't look like there's any sort of definitive answer here. Some points of view:

• They're the same, although frying might involve slightly more oil. The terms are essentially interchangeable. This is the top hit on a google search "sauteing frying" (although this question is on the first page!).
• As Aaronut says, sautéing involves jumping the food while frying involves a little more oil and less flipping or stiring of the food. Here's another source for this definition. This definition makes a delineation between pan frying and shallow frying.
• Frying is the same as shallow frying and involves partially submerging the food in oil. Food is normally breaded first. There's no distinction between frying and shallow frying. This is Martha Stewart's definition.

As you can see, it's really all over the map, and that was just from the first page of the google results. I think we're getting in to issues with language changing beneath us. However, I think the safest bet is probably that sautéing involves a lot of stirring, frying doesn't, and I should consider refining my own definitions.

Caramelizing (which fortunately doesn't have any of the same confusion) is a process that happens during cooking when sugar oxidizes. There are many different ways that you can achieve this effect. One of the ways is to sauté or fry (depending on your definition) something until the water sweats out and the remaining sugar heats up.

So the answer is that you are caramelizing the onions by sautéing (or maybe frying) them.