Canning is a method of storing food in which the content of the food is processed and sealed in an airtight container (glass jars, jars such as steel and cans). Canning generally offers a shelf life of between one and five years, but can be much longer under certain conditions. A freeze-dried canned product, such as canned dried lentils, can take up to 30 years in an edible condition.
Canning is a way to process foods to extend their shelf life. The idea is to make food usable and edible long after processing. A 1997 study found that canned fruits and vegetables are rich in the same dietary fiber and vitamins as the corresponding fresh or frozen foods and in some cases canned products have been shown to have richer constituent than fresh and frozen products. During canning, the heating process makes the dietary fiber more soluble and therefore more easily fermentable in gas and physiologically active by-products in the colon. As a result, canned meat and vegetables are usually among the food products stored in emergencies.
BEGINNER'S GUIDE TO CANNING AND PRESERVING
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