Add the sliced onion, and saute for 2 minutes.
How to make chicken chili dry with gravy:
Before adding the fried chicken, just add 1 cup of water along with additional soy sauce, vinegar, and salt. Bring the mixture to a boil, and then dissolve 1 tablespoon cornflour in water. Add the cornflour slurry to the sauce and stir to thicken. Once the sauce is thickened, add fried and toss through. Serve chicken chili dry with gravy hot, with fried rice on the side.