Cut the chicken breast by hand into uneven bite-size pieces and season with the salt, pepper, garlic powder, and ground ginger.
Toss the chicken in the beaten eggs, then coat every piece in cornstarch.
Fry in hot oil in batches until deep golden with craggy crisp edges and cooked through, then drain.
For the glaze, combine the soy sauce, brown sugar, honey, rice vinegar, sesame oil, minced garlic, grated ginger, and chicken broth in a pan and bring to a simmer.
Whisk in the cornstarch slurry and cook until the glaze turns thick, dark mahogany, and glassy.
Toss the fried chicken through the glaze until every piece is lacquered and shining.
Boil the lo mein noodles until just tender, reserving ¼ cup noodle water before draining.
Heat the vegetable oil, cook the minced garlic 30 seconds, then add the soy sauce, dark soy sauce, oyster sauce, brown sugar, and sesame oil.
Toss the noodles through until every strand turns deep amber-brown and slicked, loosening with noodle water.
Twirl the noodles into a mound on one side of a round white plate and pile the glazed chicken on the other, spooning the extra glaze around both.
Scatter sliced green onions and toasted sesame seeds over the whole plate.