Spread slices of bread with mustard. Peel and finely dice onions. Cut the sausage into slices. Heat fat in two pans. Fry onions, sauerkraut and juniper berries in a pan for about 5 minutes. Add slices of sausage and fry on each side for about 1 minute.
Fry the eggs in the second pan. Add the sauerkraut to the bread. Place slices of sausage on top. Arrange fried eggs on top. Garnish with parsley