Clean the chicken, dice, season with onion, garlic, ginger powder, salt, and pepper.
In a small bowl, whisk the eggs season with salt, and pepper.
Increase the heat to high-heat add the remaining the oil and add the seasoned chicken, cook on both sides for about 2 minutes.
Teriyaki Sauce
1/4 cup soy sauce, 1 Tablespoon granulated sugar, 2 teaspoons brown sugar, 1/2 teaspoon ginger powder, 1-2 garlic (minced), 3 tablespoons water (divided), 1 teaspoon sesame oil (or your choice), 1 teaspoon cornstarch.
Separate one tablespoon of water and cornstarch, then heat the remaining ingredients, when it thickens a little bit make a slurry (mix water and cornstarch) then add to the mixture and mix. Cook until the sugar dissolves.