Swedish Meatballs

Ingredients

• 1 egg yolk
• 1/4 cup heavy cream
• 1/4 cup panko
• 1/2 lb ground pork
• 1/2 lb lean ground beef
• 1/4 cup onion, grated
• 1 tsp salt
• 1/2 tsp brown sugar, packed
• 1/4 tsp nutmeg
• 1/4 tsp allspice
• 1/4 tsp black pepper
• 2 tbsp unsalted butter
• 2 tbsp all-purpose flour
• 3/4 cup chicken broth
• 3/4 cup beef broth
• 2 tsp soy sauce
• 1/2 cup heavy cream
• Salt
• pepper
• Fresh parsley or chives
• Lingonberry jam