For the Meatballs:
- 1 pound ground beef
- 1/2 pound ground pork
- 1/2 cup breadcrumbs
- 1/4 cup grated Parmesan cheese
- 1/4 cup finely chopped onion
- 2 cloves garlic, minced
- 1 large egg
- 2 tablespoons milk
- 1 tablespoon Worcestershire sauce
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 1/4 teaspoon nutmeg
- 2 tablespoons olive oil (for frying)
For the Stroganoff Sauce:
- 2 tablespoons butter
- 1 medium onion, finely chopped
- 2 cloves garlic, minced
- 8 ounces mushrooms, sliced
- 2 tablespoons all-purpose flour
- 2 cups beef broth
- 1 tablespoon Worcestershire sauce
- 1 cup sour cream
- 1 tablespoon Dijon mustard
- Salt and pepper to taste
- Fresh parsley, chopped (for garnish)