Heat oven to 400°F (205°C). Line a rimmed baking sheet with parchment or foil and lightly oil it so nothing sticks.
In a large bowl, combine turkey, panko, egg, garlic, ginger, scallion whites, soy sauce, sesame oil, salt, and pepper. Stir with a fork or your hands until just combined—don't overwork it unless you like bouncy meatballs (you don't).
Scoop into 1.5-inch balls (about 24 meatballs). Lightly wet hands to keep things from sticking. Arrange evenly on the sheet.
Cook for 14–16 minutes, until lightly browned and the center hits 165°F. They'll finish in the glaze, so don't overdo it.
While baking, whisk soy, honey, rice vinegar, hoisin, sriracha, ginger, garlic, and water in a skillet over medium heat. Once it simmers, stir in the cornstarch slurry. Cook 1–2 minutes until glossy and thick enough to coat a spoon.
Add baked meatballs to the skillet. Turn to coat and simmer 1–2 minutes to let the glaze cling like it means it.
Sprinkle with sesame seeds and scallion greens. A squeeze of lime over the top? Chef's kiss.
Plate with jasmine rice, cauliflower rice, or noodles. Add quick-pickled cucumbers or steamed broccoli if you're feeling balanced. Or not—your kitchen, your rules.