Soak rolls in water; Peel and core the apple and cut into small pieces. Peel onion and chop finely.
Mix the minced meat, egg, diced onion and bread roll together; then add apple pieces and raisins. Shape the mixture into approx. 8 meatballs and fry on both sides in hot fat.
Mix the sour cream with lemon juice and season with salt, pepper and curry.