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42.01 This one has probably been out for a day for this color, but I held itout probably for a week and it's actually the same color. It's just a bit weird looking ' cause it stays green for that long, but so I mean I think a bit of takeaway here is, if youre making a small batch of pesto, just for your pasta dinner like on Tuesday night, you would probably end up doing this. But it's like august and you have a huge batch of basil pestoyou want to make.It's a quick step that you can take and in the end you know going to keep a lot prettier from when you serve it. I think thats it, an easy takeaway.
42.31 (Jack) It's a lot better, I mean I grew up, my grandmother would add vitamin C ' cause the acid can actually work but then you can taste vitamin C in the pesto (Dan) and someone mentioned lemon juice too. It does have some effect, it not as affective as doing this, as well as garlic if you put garlic in your pesto thatAllicin component you talked about can have some effect. Blanching is by far the most effective.
42.59 (Jack) So continue on with all the theme about heat of course probably the most familiar with cooking would be meat and I want to talk a little bit about when you order a steak at a really good steak house. Why is it so good and why is that the steak that you get at the supermarket usually kind of mediocre?One of the main reasons, besides the skill of the people who are cooking, is probably that steak was dry-aged and they are basically hanging the meat or letting it rest in a humid refrigerator that is probably somewhere between 32 and 40 degrees. And during that time, beside the evaporationwhich is sort of concentrating the flavor compounds there is actually enzyme in the meat that are breaking down the muscle protein and making that steak much more tender. Theres two really important enzymes in meat, Calpain and Cathepsin. The calpain breaks down the protein that hold the musclefibers sort of in place and cathepsinbreaks apartsort of filaments and supporting moleculesandalso breaks down the collagen that is in the connective tissues. And the overall result is if a steak spends 3-4 weeks being dry-aged, you end up not only with formation enables itsflavor flow, mineral acids andPeptides, but the muscle fiberthat is broken down are much much more tender. And the basically dry-aging equals tender texture and more flavor.
44.30 North range that rich those enzymes do the work, get covered bytemperature and at 32 or 35 degrees, it's actually working very very slowly, which is why dry-aging a streak for a day or two in your refrigerator isn't really going to work and your refrigerator is much too dry to be able to do it for 30 days for instance. It needs to be in a humid environment and it needs a specially controlled environment that they have in the restaurants.
44.59 The rate which this enzymes work, heats up so to speak, speeds up, and basically in two you get in this illustration anywhere below 122 degrees, the enzyme is basically shading apart, and it's breaking down those proteins in it. At 60 degrees, it's faster than 40. At 80, it's faster than 60 and so on. Basically once it shut off at 122 degrees.
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