Wash the apple, rub dry, grate finely. Mix with salad cream and curry powder, add some salt and pepper. Clean and wash the lettuce, pluck it into small pieces and let it drip off. Peel onions and cut into fine rings. Clean and wash the bell peppers and cut them into fine rings
Knead minced meat, mustard and curd cheese, season with salt and pepper. Form 4 flat meatballs from the mixture, adapting to the size and shape of the slices of bread. Heat the oil in a coated pan. Fry the meatballs for 6-8 minutes, depending on their thickness, turning them, remove them and let them cool down a little.
Spread 4 slices of bread with curry cream, cover with lettuce, meatballs, paprika and onions and the remaining slice of bread, if necessary pin them with 2 wooden skewers each. Cut the breads diagonally in half and arrange