1Preheat an oven to 400 degrees F (200 degrees C).
2Place the defrosted beef and ground turkey into a mixing bowl, and season with salt, onion, garlic salt, Italian seasoning, oregano, red pepper flakes, hot pepper sauce, and Worcestershire sauce; mix well.
3Add the milk, Parmesan cheese, and bread crumbs. Mix until evenly blended, then form into 1 1/2-inch meatballs (I use an ice cream scoop to make them uniform in size), and place onto a baking sheet.
4Bake in the preheated oven until no longer pink in the center, 20 to 25 minutes.