Peel and roughly chop the onion. Melt the lard in a pan over medium heat and fry the onions in it until golden brown. Leave to cool.
Put the ground meat in a mixing bowl. Add the fried onions and an egg. Season with salt and pepper.
With hands moistened in cold water, shape small sausages of approximately 3x1 inches (7.5x2.5 cm).
Preheat the oven to 360 °F (180 °C).
Line a baking tray with parchment paper and arrange the cevapcici sausages on it—Bake in the well-preheated oven for 20 minutes.
Serve warm with boiled potatoes, topped with melted butter. Add a dollop of yellow mustard, garnish with fresh onions cut into rings.
Makes around 4-6 portions.
To make sure the meat mixture is appropriately seasoned, cook a small patty on both sides in a frying pan over medium heat in a bit of oil or lard. Let cool for a few minutes and taste. Season the remaining mixture with salt and pepper if necessary.
Instead of baking cevapcici in the oven, you can also pan-fry the sausages in a bit of oil. Turn until the cevapcici is browned on all sides.