Remove tips and strings from peas; if pods are large, cut them in half.
Mix peas and bean sprouts.
Cut onion, green pepper, and celery into small pieces (don't chop).
Cut ham, including fat, into thin strips.
Put ham into large kettle and fry a few minutes to bring out fat.
Add onion, green pepper, and celery, and cook until they are wilted slightly.
Add the mixed peas and bean sprouts, cover, and cook for 10 minutes, or until wilted.
Mix together the soy, cornstarch, water, and salt; pour over vegetables and cook a few minutes longer, stirring occasionally.