1.  Preheat oven to 350ºF.
2.  Cook lasagna as directed on package.
3.  Cook onion and green pepper in margarine until tender.
4.  Stir in soup, mushrooms, skim milk and basil.
5.  Lay half the noodles in 13" x 9" dish.
6.  Top with half each of chicken, cheeses and soup mixture.
7.  Repeat process.
8.  Bake for 45 minutes.