In a large pot saute the onion, carrot and celery for about 5-6 minutes. Add the dried peas. Add the ham bone. Add the chicken stock. Add salt and pepper to taste. Stir the soup frequently for about an hour. Add a can of peas. Continue stirring the soup. Transfer the soup to a food processor or blender to puree.If the soup gets to thick, add water 1/4 c. at a time. Taste for flavor. Top with croutons. Bon Appetit.