01 - Combine breadcrumbs and milk in a large bowl and allow to soak for 5 minutes.
02 - Add ground beef, ground pork, onion, garlic, egg, salt, pepper, allspice, and nutmeg to the bowl. Mix gently until incorporated, without overworking the mixture.
03 - Shape the meat mixture into small balls, approximately the size of a walnut or about 1 1/4 inches in diameter.
04 - Heat butter and vegetable oil in a large skillet over medium heat. Fry meatballs in batches for about 8 minutes, turning occasionally to brown evenly. Set browned meatballs aside.
05 - Melt butter in the same skillet. Stir in flour and cook for 1 minute, whisking constantly.
06 - Gradually pour in stock while whisking to prevent lumps. Add cream, soy sauce, and Dijon mustard. Simmer the sauce for 5–7 minutes until thickened.
07 - Return meatballs to the skillet, ensuring they are coated well with sauce. Simmer gently for 5–10 minutes until heated through.
08 - Serve hot, ideally accompanied by mashed potatoes, lingonberry jam, and freshly steamed vegetables.