Reheat the oven at 375 F, cut your potatoes into cubes and fry them in a pan with some oil, do not over fry , we will put them into oven later.after in the same pan brown your chicken breasts.put them aside. Boil some water Cook your veggies, if you like you can steam them

Put your chicken into a oven safe baking dish. Cover with potatoes, then put your veggies over them. Time to prepare your sauce. Melt butter in a pan, add your flour, stir to prevent burning, while stirring add your milk, stir until sauce turn to creamy.add salt and pepper to taste

Pour sauce into chicken mix,

Add your cheese, I used mozzarella and Parmesan

Place dish back to oven. Run broiler, until cheese change its color to brownish.