Preheat oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a large bowl, combine ground beef, ground pork, bread crumbs, milk, egg, salt, and pepper. Mix gently until just combined.
0.5 pound ground beef
Roll the meat mixture into 1-inch meatballs. Place them on the prepared baking sheet.
Bake for 15-20 minutes, or until browned and cooked through.
While the meatballs are baking, prepare the sauce. In a medium saucepan, whisk together ketchup, brown sugar, white vinegar, soy sauce, Worcestershire sauce, and garlic powder.
0.5 pound ground beef
Bring the sauce to a simmer over medium heat, stirring occasionally. Reduce heat to low and cook for 5-10 minutes, until slightly thickened.
Add the baked meatballs to the sauce and stir gently to coat. Simmer for another 5-10 minutes to heat the meatballs through and allow the flavors to meld.
0.5 pound ground beef
Serve hot, as an appetizer or over rice.
Notes
Garnish with sesame seeds and sliced green onions for an extra touch of flavor and visual appeal.