01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large bowl, combine ground beef, egg, breadcrumbs, garlic, green onions, soy sauce, ginger, salt, and pepper. Mix until just combined.
03 - Shape mixture into 16–18 meatballs (about 1 1/2 tbsp each) and place them on the prepared baking sheet.
04 - Bake meatballs for 18–20 minutes, or until cooked through and browned.
05 - Rinse rice under cold water until water runs clear. Combine rice, water, and salt in a saucepan. Bring to a boil, then reduce heat to low, cover, and simmer for 15 minutes. Remove from heat and let stand, covered, for 5 minutes. Fluff with a fork.
06 - In a small saucepan, whisk together Sriracha, honey, soy sauce, rice vinegar, and sesame oil. Heat over medium-low until simmering and slightly thickened, about 2–3 minutes. Remove from heat.
07 - Once meatballs are done, transfer them to a large bowl. Pour Sriracha glaze over the meatballs and toss to coat evenly.
08 - Serve glazed meatballs over steamed rice. Garnish with sesame seeds and sliced green onions if desired.