Chicken Pot Pie Casserole

heat the oven degrees

place of butter into a saucepan. melt over heat. once add the butter. whisk and cook until golden

add the onion

slowly whisk in the chicken stock and 1 cup milk. whisk until most of the flour clumps are broken up. bring to a boil. add the salt and potatoes

lower the heat and bring to a simmer. cook until the potatoes are al dente and the sauce is thickened

remove from the oven and let cool