sentence: boil peeled potato and sweet potato in water sentence: drain and dry the potatoes sentence: add milk and pepper while mashing the potatoes sentence: blend the potatoes sentence: add some diced vegetables and ground beef to a sauce pan sentence: add salt tomato paste and stock to the pan sentence: cover the sauce pan sentence: pour the mixture into a baking tray sentence: cover the dish with mashed potatoes sentence: cook it in the oven and then serve