Cook spaghetti according to package directions, meanwhile Brown Chicken breast and set aside
heat oven to 350
melt 1/4 cup butter over low heat in a medium sauce pan, then slowly stir in 1/4 cup flour until it is bubbly an smooth. Remove from heat.
Slowly stir in 1cup chicken broth and 1 cup milk.Salt and pepper to taste. Boil for 1 whole minute until sauce thickens. Remove from heat.
Melt 2 tablespoon of butter over low heat and then add cornflakes and mix together.
In a 2 quart casserole combine sauce and noodles. Place chicken breast on top. Then sprinkle the cornflake crust over top of the chicken breast. Cook for 40 minutes or until chicken is done and no longer pink in the middle.