01 - Preheat the oven to 400°F. Line a baking sheet with parchment paper or aluminum foil, then lightly grease it.
02 - In a large mixing bowl, combine the ground beef, breadcrumbs, egg, milk, finely chopped onion, minced garlic, chopped fresh parsley, salt, black pepper, smoked paprika, and Worcestershire sauce. Mix gently until just combined; avoid overmixing to maintain tenderness.
03 - Using damp hands, form the meat mixture into 1.5-inch diameter meatballs. Arrange them evenly on the prepared baking sheet.
04 - Bake the meatballs for 15 minutes, or until they are browned and partially cooked through.
05 - While the meatballs bake, combine the BBQ sauce, honey, and apple cider vinegar in a small saucepan. Heat over medium-low heat, stirring occasionally, until the glaze is warm and slightly thickened, which takes approximately 5 minutes.
06 - Carefully remove the meatballs from the oven. Using tongs or a spoon, transfer them to the saucepan with the prepared BBQ glaze and gently toss to ensure each meatball is thoroughly coated.
07 - Return the glazed meatballs to the baking sheet. Continue baking for an additional 8 to 10 minutes, until the sauce is bubbling and the meatballs are fully cooked, reaching an internal temperature of 160°F. Serve hot, with extra sauce for dipping if desired.