01 - Preheat oven to 400°F and line a baking sheet with parchment paper.
02 - In a large bowl, mix ground beef, breadcrumbs, Parmesan, egg, milk, garlic, salt, black pepper, and parsley until just combined without overmixing.
03 - Shape the mixture into 1-inch diameter meatballs and arrange them evenly on the prepared baking sheet.
04 - Bake for 15 to 18 minutes, until meatballs are browned and cooked through.
05 - While meatballs bake, combine cranberry sauce, orange juice, honey, soy sauce, orange zest, Dijon mustard, and optional cayenne in a saucepan over medium heat; stir and simmer for 5 to 7 minutes until glaze thickens slightly.
06 - Add the baked meatballs to the saucepan, gently toss to coat fully, and simmer together for 2 to 3 minutes to meld flavors.
07 - Serve warm, optionally garnished with extra parsley or orange zest.