Sausages with Mashed Potatoes and Stewed Apples

Peel the potatoes, rinse, chop and cook for about 25 minutes in boiling salted water. Peel the apples, quarter, core and dice. Peel the onions and cut into rings. Heat the butter in a skillet and saute the onions and diced apple over low heat until the apples are soft. Drain the potatoes and while still hot press through a ricer. Heat the milk and whisk the warm milk into the potatoes, add the butter and season with salt and pepper.