Preheat oven to 400°F and line a baking sheet with parchment paper or a silicone mat.
In a large bowl, combine ground chicken, panko, Parmesan, egg, olive oil, garlic powder, onion powder, salt, and black pepper.
Mix gently with your hands until just combined to avoid tough meatballs.
Use a 1.5-tablespoon cookie scoop to portion 24 equal meatballs onto the sheet pan, spacing them about 1 inch apart.
Roll each portion between your palms to form uniform balls for even cooking and reheating.
Bake for 20–25 minutes until golden and the centers reach 165°F on a meat thermometer.
Cool completely on the pan (about 30 minutes) to prevent condensation in containers.
Portion four meatballs into each of six glass meal prep containers with your preferred sides.
Label with prep date and refrigerate up to 5 days, or freeze for longer storage.