Soak yesterday's rolls in water and squeeze them out well. Peel and dice the onion. Peel and finely dice the garlic cloves. Clean / core the chilli pepper, wash and finely dice. Put all ingredients (beef meat, squeezed bread roll, onion cubes, garlic clove cubes, chilli pepper cubes. 1 egg, 1 teaspoon salt, 1 teaspoon medium hot mustard, 1 teaspoon sweet paprika and ½ teaspoon pepper) in a bowl, mix well / knead and leave for 15 minutes. Shape meatballs with moistened hands, roll in breadcrumbs and fry in a pan with rapeseed oil (6 tbsp) on both sides until golden brown. Place the meatballs on an ovenproof dish and keep them warm in the oven at 50 ° C until serving.