01 - Preheat oven to 425°F (220°C). Line a baking sheet with parchment paper.
02 - In a large bowl, gently combine ground meat, egg, breadcrumbs, minced garlic, spring onions, soy sauce, salt, and black pepper. Mix until incorporated without overworking.
03 - Shape the mixture into 20 to 24 bite-sized meatballs and arrange evenly on the prepared baking sheet.
04 - Bake for 12 to 15 minutes, until the meatballs are fully cooked and browned.
05 - While the meatballs bake, combine hot sauce, brown sugar, honey, apple cider vinegar, soy sauce, and sriracha in a saucepan over medium heat. Stir gently and bring to a simmer until sugar dissolves.
06 - Reduce heat to low. Stir butter into the sauce until melted and the mixture becomes glossy.
07 - Transfer the baked meatballs to a large bowl. Drizzle the hot firecracker sauce over the meatballs and gently toss until all pieces are evenly coated.
08 - Arrange meatballs on a platter. Garnish with sesame seeds and additional sliced spring onions. Serve immediately.