1 cup fresh breadcrumbs
1/3 cup whole milk
1 tablespoon olive oil
1/2 Â yellow onion minced
3 cloves garlic minced
2 tablespoons freshly minced parsley
1 large egg slightly beaten
1/4 cup freshly grated Parmesan cheese, optional
2 teaspoons Kosher salt
1 teaspoon black pepper
2 pounds 80/20 ground beef or lamb