Incredibly Delicious Swedish Meatballs

Ingredients

• 1 slice white sandwich bread
• 2 TBPS milk
• 1 tsp kosher salt
• 1/8 tsp ground allspice
• 1/8 tsp ground nutmeg
• 1/8 tsp ground cardamom
• 1/8 tsp white pepper
• 1 TBSP olive oil
• 1/3 cup finely chopped onion
• 1/2 pound ground pork
• 1/2 pound ground beef
• 1 egg yolk
• 1/4 cup California Prune purée
• 2 TBSP butter
• 2 TBSP all-purpose flour
• 2 cups beef broth
• 1/4 cup sour cream
• Salt and white pepper
• 1 1/2 TBSP chopped fresh dill