Squeeze the 2 lemons. Mix the lemon juice with 0.25 liter cream, 2 cups yogurt (10% fat), 50 grams sugar, salt, pepper, 10 juniper berries, 6 cloves, and 3 bay leaves.
Cut the 300 grams of onions into fine rings. Cut the 400 grams of sour apples into eighths, remove the cores, and cut into thin slices. Mix the onions and apples into the sauce.
Drain the matjes fillets and pour the sauce over them.