Swedish Meatballs (Köttbullar)

المكونات

• 500 g ground beef
• 250 g ground pork
• 100 ml milk
• 50 g breadcrumbs
• 1 piece egg
• 1 piece onion, finely chopped
• 1 tsp salt
• 0.5 tsp black pepper
• 0.25 tsp allspice
• 0.25 tsp nutmeg
• 2 tbsp butter
• 2 tbsp all-purpose flour
• 500 ml beef broth
• 100 ml heavy cream
• 1 tbsp soy sauce (optional)
• 1 tbsp lingonberry jam, for serving
• as needed g mashed potatoes, for serving