How to extract edible protein from existing foods in commercial quantities?

The rising cost of eggs and chicken in Bangladesh makes it really important to find better ways to get protein from farming and fishing. Since the country has a lot of farms and water resources, it can use these to get more protein, which can help people afford food and might also help the country earn money by selling these products to other countries. To make this work, solutions need to be invented to extract edible protein from existing protein based food using technological intervention and with a competitive price. This will help make food more available and cheaper for everyone in Bangladesh. By developing innovative methods for protein extraction, Bangladesh can effectively address the issue of protein deficiency in its population.