01 - Preheat the oven to 400°F and line a baking sheet with parchment paper.
02 - In a large mixing bowl, combine ground beef, egg, breadcrumbs, milk, minced garlic, grated ginger, Sriracha sauce, green onions, soy sauce, sesame oil, salt, and black pepper. Mix gently until just combined without overworking.
03 - Shape the mixture into 18 evenly sized meatballs using damp hands or a small scoop, then arrange them on the prepared baking sheet.
04 - Bake for 18 to 20 minutes until the meatballs are cooked through and golden brown.
05 - While meatballs bake, whisk together Sriracha, honey, soy sauce, rice vinegar, and sesame oil in a small saucepan.
06 - In a separate bowl, blend cornstarch with water until smooth, then whisk into the saucepan mixture.
07 - Heat the glaze over medium heat, stirring constantly until thickened, about 2 to 3 minutes, then remove from heat.
08 - Toss the baked meatballs in the warm glaze until thoroughly coated.
09 - Transfer the coated meatballs to a serving dish and optionally garnish with chopped green onions and toasted sesame seeds.