Stock is a flavorful liquid made by gently simmering bones and or vegetables.
Stock is the liquid—technically a “water extract”—that results from simmering animal bones, meat, and/or vegetables with water, often with the addition of aromatic herbs and spices. It makes up the base cooking liquid for soups, stews, and grains, but also is used in smaller amounts to flavor sauces and braised meats and vegetables.
Clarity
Flavor
Body
is a stock made from bones that have already been cooked in another food preparation. When simmered in water a second time, the result is a pale and weak- flavored liquid.
Preparing Stock
Combine bones or vegetables in cold water or liquid
Bring to a simmer
Skim as necessary
Add mirepoix and aromatics at the appropriate time
Simmer until correct flavor and color
Strain, use immediately or cool and store
Once you’ve made your homemade stock, strain it through a fine-mesh sieve, discarding the solids. Cool to room temperature on the counter (to prevent bacteria from forming due to rapid temperature change), then refrigerate. For meat-based stocks, remove the fat that solidifies on top of the stock, and save for another purpose.
For longer-term storage, freeze stock in plastic yogurt containers, jars, ziplock bags, or ice cube trays. If freezing in glass jars, be sure to leave enough head space above the stock—at least an inch—so that when it solidifies and expands in the freezer, the jars won’t break.
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REFERENCES:
https://www.ihmnotes.in/assets/Docs/Sem-1/FP/UNIT%206.2_Stocks.pdf
http://549online.org/pluginfile.php/31717/mod_resource/content/1/Stocks__Sauces_and_Soups-10.pdf
https://www.masterclass.com/articles/cooking-101-stocks-vs-broths-and-how-to-make-5-different-stocks#4-tips-for-making-stock-at-home