"sharp lightning"

Peel and chop the potatoes into 4 pieces. Peel the apples, cut out the core with the seeds, cut into large pieces. Fold the potatoes into a saucepan, pour boiling water into half, add the apples and oil, bring to a boil and cook on a low heat for about half an hour until tender. Drain the liquid, mix well potatoes and apples, salt, pepper, add sugar. Serve with fresh or fried blood sausage.