Albondigas en Salsa (Tapas-Style Meatballs)

Ingredients

• 1 1/2 pounds ground beef
• 1 1/2 pounds ground pork
• 1/2 cup bread crumbs
• 1/4 cup finely chopped flat-leaf parsley
• 4 eggs, lightly beaten
• 8 cloves garlic, finely chopped
• 1 cup plus 2 T flour
• 1 cup olive oil
• 1 large yellow onion, chopped
• 1 large leek, white part only, chopped
• 1 dried bay leaf
• 2 1/2 cups beef broth
• 1 1/2 cups white wine