Rachel I actually cheat quite a bit when I make chicken soup...

here goes

4 cups chicken broth
1/4 roast chicken from corner shop
1 carrot diced
1 celery stick diced
1/2 onion diced
1 tsp garlic
salt & pepper to taste
100gm pasta noodles broken down to bite size pieces

I put the chicken broth on a slow boil and add the carrot and celery and onion and garlic in, I cover it. 10 minutes later I add the pasta and I tear off the chicken off the bones & pop it in. I check for when the pasta & veges are cooked and if they are I taste test and add salt & pepper if needed. HTH!