01 -
Set your oven to 325°F (163°C) and grease a big baking pan lightly.
02 -
Sprinkle salt and pepper onto the chicken. Cover the pieces in cornstarch, then dunk them in the whisked eggs to get an even coat.
03 -
Warm up the oil in a big skillet using medium-high heat. Cook chicken on all sides in small batches until golden, which takes about 2-3 minutes per side. Don't worry about fully cooking it yet.
04 -
In a bowl, stir together ketchup, sugar, vinegar, soy sauce, garlic powder, and onion powder until it's smooth.
05 -
Put the browned chicken pieces into the greased baking pan. Evenly pour the sauce over the chicken so every piece is covered. Bake uncovered for an hour, stirring every 15 minutes so the sauce thickens and coats well.