Step1:Take some black beans and wash them. Put them into the pot and cook until they are more than seven minutes ripe. Prepare proper amount of vinega
Step2:Put the cooked beans into the prepared container, add some vinegar (at least not more than black beans) and add some ice sugar to the sour ones. No more. PS. cooked beans must be refrigerate
Cooking tips:There are skills in making delicious dishes.