Mom's Chicken Soup

When I was little and the doctor came over because I was sick, yes Dr. Harrison made house calls, my mom asked her she should be giving us vitamins. At the time my mom had her chicken soup on the stove. Dr. Harrison took one look in the pot and said, "Mrs. Lombardi if this is what you are serving your family they are getting more than enough vitamins!" Well this is my version of her soup. She probably made the fresh stock where I opted for canned.

Chop onion, 2 stalks of celery and 2 peeled carrots. Heat oil in pan and add vegetables. Cook until tender. Add chicken stock and heat. Add chopped up cooked rotissierie chicken (another short cut I know my mom did not use). Next add some cooked pasta, something like a noodle is best. Add fresh spinach. In another pan add some broth and heat to almost boiling. Beat and egg and slowly add to broth stirring vigorously. Cook the egg through. Add the egg to the soup pan. Serve with Parmesan Cheese.