Heat oil in a medium skillet over medium high heat. Add chicken breasts and saute until tender. Meanwhile, prepare potatoes according to package directions, adding 1 cup (instead of 2/3 cup) of milk and sliced potatoes. When chicken is tender, remove from heat, let cool and shred. Add shredded chicken to potato mixture.
Fold chicken/potato mixture into a 9x13 inch baking dish. Cover and bake in the preheated oven for 25 to 35 minutes. Add cheese and bake for another 10 minutes.
recipepes.comCheesy Chicken and Potato Casserole, recipePT15MPT1H5455 calories