Heat the olive oil in a large thick frying pan. Add the potatoes and sauté lightly. Add tomato concentrate, harissa diluted in a little water, the garlic and caraway seed, and the paprika. Pour in just enough water to cover and cook over low heat for about ¾ hour. Add sausages and cook for a further 15 minutes.
Beat the eggs and pour them into the pan gradually, stirring constant