Swedish Meatball Recipe

Name: Swedish Meatball Recipe
Prep time: 25 min
Cook time: 40 min
Total time: 1 h 5 min
Cuisine: American
Ingredients: 2 tablespoons olive oil (divided in half); ½ cup yellow onion (finely diced); 2 cloves garlic (minced); ½ cup panko breadcrumbs; ¼ cup Parmesan cheese; 1 large egg (whisked); 1/3 cup milk; 1 teaspoon salt; ¼ teaspoon EACH: dried oregano, ground allspice, ground nutmeg, pepper; ¾ lb. ground beef (80% lean); ½ lb. ground pork; 4 tablespoons butter; 4 tablespoons flour; 2 cups beef broth; 1 cube chicken bouillon (see notes); 2 teaspoons Worcestershire sauce; 1 teaspoon Dijon mustard (can sub mustard powder); 1 teaspoon dried parsley; ½ cup sour cream (at room temperature)