Soy egg can also be made with a substitute cultivated by coagulating soy milk also known as what 
Soy egg: A soy egg is a type of Chinese egg cooked in soy sauce, sugar, water, as well as other optional herbs and spices. Tofu also can use same way to cook it, called soy tofu. Tofu: Tofu, also known as bean curd, is a food cultivated by coagulating soy milk and then pressing the resulting curds into soft white blocks.
i don't know