01 - Preheat oven to 375°F. Lightly grease a 9x13-inch baking dish.
02 - In a large mixing bowl, blend ground beef, breadcrumbs, egg, milk, onion, garlic, salt, black pepper, and smoked paprika until just incorporated.
03 - Shape mixture into 1-inch meatballs, yielding approximately 24 uniform pieces.
04 - Heat a skillet over medium-high. Sear meatballs on all sides for 5 to 6 minutes; they do not need to be cooked through.
05 - Stir together barbecue sauce, ketchup, and Worcestershire in a small bowl. Spread half the mixture over bottom of the prepared baking dish.
06 - Distribute browned meatballs evenly over the sauce layer.
07 - Split each biscuit horizontally to create 16 halves. Nestle biscuit pieces between and around meatballs in the dish.
08 - Cover meatballs and biscuits with the remainder of the barbecue sauce mixture.
09 - Lightly brush tops of biscuits with melted butter using a pastry brush.
10 - Bake for 20 minutes, remove from oven and evenly sprinkle cheddar cheese on top. Return to oven for 10 to 15 minutes, until biscuits are golden and cheese is melted and bubbling.
11 - Allow dish to rest for 5 minutes. Garnish with fresh parsley, if desired, and serve warm.