Place the chicken broth in a large pot and bring
to a boil.
Add the celery, red & green pepper,
mushrooms, olives, tomato puree and tomato
Cook over medium high heat for 30
Stir in the pasta and cook until al dente about
Fold in the reserved
Preheat the oven to 350
Combine the 3 cheeses in a
Alternately layer the chicken mixture with the
mixed cheese in a large
oven proof casserole, ending with a layer of
Cook the casserole until the cheese is
completely melted and bubbly - about 30 minutes.